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{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
{{Infobox planet
| minorplanet = yes
| minorplanet = yes
| name = 2023 Asaph
| name = 2023 Asaph
| background = #FFFFC0
| background = #D6D6D6
| image =
| image =
| image_size =
| caption =
| caption =
| discovery_ref =  <ref name="jpldata" />
| discovery_ref = &thinsp;<ref name="jpldata" />
| discovered = 16 September 1952
| discovered = 16 September 1952
| discoverer = [[Indiana Asteroid Program]]
| discoverer = [[Indiana University (Bloomington)|Indiana University]]<br />{{nowrap|{{small|([[Indiana Asteroid Program]])}}}}
| discovery_site = [[Goethe Link Observatory|Goethe Link Obs.]]
| discovery_site = [[Goethe Link Observatory|Goethe Link Obs.]]
| mp_name = 2023 Asaph
| mpc_name = (2023) Asaph
| alt_names = 1952 SA
| alt_names = 1952 SA
| named_after = [[Asaph Hall]]<ref name="springer" />
| named_after = [[Asaph Hall]]<br />{{small|(American astronomer)}}<ref name="springer" />
| mp_category = [[main-belt]] {{small|(outer)}} <ref name="lcdb" />
| mp_category = [[main-belt]]{{·}}{{small|([[Kirkwood gap|outer]])}}<ref name="lcdb" />
| orbit_ref =  <ref name="jpldata" />
| orbit_ref = &thinsp;<ref name="jpldata" />
| epoch = 13 January 2016 ([[Julian day|JD]] 2457400.5)
| epoch = 4 September 2017 ([[Julian day|JD]] 2458000.5)
| uncertainty = 0
| uncertainty = 0
| observation_arc = 62.76 yr (22924 days)
| observation_arc = 64.53 yr (23,571 days)
| aphelion = {{Convert|3.6831|AU|Gm|abbr=on|lk=on}}
| aphelion = 3.6816 [[Astronomical unit|AU]]
| perihelion = {{Convert|2.0707|AU|Gm|abbr=on}}
| perihelion = 2.0703 AU
| semimajor = {{Convert|2.8769|AU|Gm|abbr=on}}
| semimajor = 2.8760 AU
| eccentricity = 0.28024
| eccentricity = 0.2801
| period = 4.88 [[Julian year (astronomy)|yr]] (1782.3 [[Julian year (astronomy)|d]])
| period = 4.88 [[Julian year (astronomy)|yr]] (1,781 days)
| mean_anomaly = 337.42[[Degree (angle)|°]]
| mean_anomaly = 98.697[[Degree (angle)|°]]
| mean_motion = {{Deg2DMS|0.2021|sup=ms}} / day
| inclination = 22.352°
| inclination = 22.352°
| asc_node = 3.1318°
| asc_node = 3.1290°
| arg_peri = 357.60°
| arg_peri = 357.53°
| dimensions = {{val|21.29|0.40}} km<ref name="AKARI" /><br />{{val|19.678|0.264}} km<ref name="WISE" /><br />{{val|20.56|0.43}} km<ref name="Masiero-2012" /><br />26.64 km {{small|(calculated)}}<ref name="lcdb" />
| dimensions = {{val|19.678|0.264}} km<ref name="WISE" /><ref name="Masiero-2011" /><br />{{val|20.56|0.43}} km<ref name="Masiero-2012" /><br />{{val|21.29|0.40}} km<ref name="AKARI" /><br />25.44 km {{small|(calculated)}}<ref name="lcdb" />
| rotation = {{Convert|3.87|h|d|abbr=on|lk=on}}<ref name="jpldata"/><ref name="Warner-2010j" /><br />{{val|4.74|0.01}} h<ref name="Warner-2003c" /><br />{{val|9.19|0.05}} h<ref name="geneva-obs" />
| rotation = {{val|3.87|0.02}} h<ref name="Warner-2010j" />{{efn|name=lightcurve-plot-Warner}}<br />{{val|4.74|0.01}} [[Hour|h]]<ref name="Warner-2003c" /><br />{{val|9.19|0.05}} h<ref name="geneva-obs" />
| albedo = {{val|0.090|0.004}}<ref name="AKARI" /><br />{{val|0.1045|0.0204}}<ref name="WISE" /><br />{{val|0.096|0.018}}<ref name="Masiero-2012" /><br />0.057 {{small|(assumed)}}<ref name="lcdb" />
| albedo = 0.057 {{small|(assumed)}}<ref name="lcdb" /><br />{{val|0.090|0.004}}<ref name="AKARI" /><br />{{val|0.096|0.018}}<ref name="Masiero-2012" /><ref name="Masiero-2011" /><br />{{val|0.1045|0.0204}}<ref name="WISE" />
| spectral_type = [[C-type asteroid|C]] <ref name="lcdb" />
| spectral_type = [[C-type asteroid|C]]&thinsp;<ref name="lcdb" />
| abs_magnitude = 11.6<ref name="WISE" /><ref name="Masiero-2012" /><ref name="AKARI" />{{·}}11.7<ref name="jpldata" /><ref name="lcdb" />
| abs_magnitude = 11.6
| mean_motion = {{Deg2DMS|0.20198|sup=ms}} / day
| moid = {{Convert|1.06639|AU|Gm|abbr=on}}
| jupiter_moid = {{Convert|1.76468|AU|Gm|abbr=on}}
| tisserand = 3.129
}}
}}


'''2023 Asaph''', provisional designation 1952 SA, is a carbonaceous [[asteroid]] in the outer regions of the [[main-belt]], about 21 kilometers in diameter.<ref name="Masiero-2012" /> It was discovered on September 16, 1952 by the [[Indiana Asteroid Program]] at [[Goethe Link Observatory]] near [[Brooklyn, Indiana|Brooklyn]] in the U.S state of Indiana.<ref name="MPC-Asaph" /> The asteroid orbits the Sun at a distance of 2.1–3.7 [[Astronomical unit|AU]] once every 4 years and 10 months (1,782 days) and its relatively eccentric orbit is [[Orbital inclination|tilted]] by 22 degrees to the plane of the ecliptic.<ref name="jpldata" /> Depending on different observations, it takes between 3.9 and 9.2 hours to [[rotation period|rotate]] once around its axis. The [[C-type asteroid|C-type]] asteroid has a geometric albedo of nearly 0.10.<ref name="AKARI" /><ref name="WISE" />
'''2023 Asaph''', provisional designation {{mp|1952 SA}}, is a dark [[asteroid]] from the outer regions of the [[asteroid belt]], approximately 21 kilometers in diameter.<ref name="Masiero-2012" /> It was discovered on 16 September 1952, by astronomers of the [[Indiana Asteroid Program]] at [[Goethe Link Observatory]] in Indiana, United States.<ref name="MPC-Asaph" />


== Orbit and classification ==
It was named in memory of [[Asaph Hall]] (1829–1907), who discovered the [[satellites of Mars|Martian satellites]], [[Phobos (moon)|Phobos]] and [[Deimos (moon)|Deimos]].<ref name="springer" />

''Asaph'' orbits the Sun in the [[Kirkwood gap|outer]] main-belt at a distance of 2.1–3.7&nbsp;[[Astronomical unit|AU]] once every 4 years and 11 months (1,781 days). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.28 and an [[orbital inclination|inclination]] of 22[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The asteroid's [[observation arc]] begins with its official discovery observation Goethe Link.<ref name="MPC-Asaph" />

== Physical characterization ==

In November 2001, a rotational [[lightcurve]] of ''Asaph'' was obtained from photometric observations by American astronomer [[Brian D. Warner|Brian Warner]]. Lightcurve analysis gave a [[rotation period]] of 4.74 hours with a low brightness variation of 0.06 [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=2-]]}}).<ref name="Warner-2003c" /> Upon re-examination of the revised data set, Warner constructed a new, ambiguous lightcurve with two possible period solutions of {{val|3.87}} and {{val|6.28}} hours ({{small|[[LCDB quality code|U=2-]]}}).<ref name="Warner-2010j" />{{efn|name=lightcurve-plot-Warner}} These observations supersede a period of 9.19 hours derived from two fragmentary lightcurves obtained in 2001 and 2006, respectively ({{small|[[LCDB quality code|U=1/1]]}}).<ref name="geneva-obs" />

=== Diameter and albedo ===

According to the surveys carried out by the Japanese [[Akari (satellite)|Akari satellite]] and the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]], ''Asaph'' measures between 19.678 and 21.29 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] between 0.09 and 0.1045.<ref name="WISE" /><ref name="Masiero-2011" /><ref name="Masiero-2012" /><ref name="AKARI" />

The ''Collaborative Asteroid Lightcurve Link'' assumes a standard albedo for [[C-type asteroid|carbonaceous asteroids]] of 0.057 and consequently calculates a larger diameter of 25.44 kilometers based on an [[absolute magnitude]] of 11.7.<ref name="lcdb" />

== Naming ==

This [[minor planet]] was named in memory of American astronomer [[Asaph Hall]] (1829–1907), who discovered the [[satellites of Mars|Martian satellites]], [[Phobos (moon)|Phobos]] and [[Deimos (moon)|Deimos]].<ref name="springer" /> The official {{MoMP|2023|naming citation}} was published by the [[Minor Planet Center]] on 15 October 1977 ({{small|[[Minor Planet Circulars|M.P.C.]] 4238}}).<ref name="DoMP-Circular-dates" />

== Notes ==
{{notelist|refs=

{{efn|name=lightcurve-plot-Warner|1=[http://www.minorplanetobserver.com/pdolc/A2023_2001.HTM Lightcurve plot of 2023 Asaph], Palmer Divide Observatory, Brian Warner (2001). The lightcurve is ambiguous with two possible period solutions of {{val|6.28|0.05}} and {{val|3.87|0.02}} hours.}}

}} <!-- end of notelist -->


== References ==
== References ==
{{reflist
{{reflist|30em|refs=
|refs=


<ref name="jpldata">{{cite web
<ref name="jpldata">{{cite web
|type=2015-06-22 last obs.
|type = 2017-03-30 last obs.
|title=JPL Small-Body Database Browser: 2023 Asaph (1952 SA)
|title = JPL Small-Body Database Browser: 2023 Asaph (1952 SA)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002023
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002023
|publisher=Jet Propulsion Laboratory
|publisher = [[Jet Propulsion Laboratory]]
|accessdate=17 April 2016}}</ref>
|access-date = 6 July 2017}}</ref>


<ref name="springer">{{cite book
<ref name="springer">{{cite book
|title = Dictionary of Minor Planet Names – (2023) Asaph
|url=http://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_2024
|last = Schmadel | first = Lutz D.
|title=Dictionary of Minor Planet Names – (2023) Asaph
|publisher = [[Springer Berlin Heidelberg]]
|last=Schmadel |first=Lutz D.
|page = 164
|publisher=Springer Berlin Heidelberg
|date = 2007
|page=164
|isbn = 978-3-540-00238-3
|date=2003
|isbn=978-3-540-29925-7
|doi = 10.1007/978-3-540-29925-7_2024 |chapter = (2023) Asaph }}</ref>

|accessdate=October 2015}}</ref>
<ref name="MPC-Asaph">{{cite web
|title = 2023 Asaph (1952 SA)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2023
|access-date = 6 July 2017}}</ref>

<ref name="DoMP-Circular-dates">{{cite book
|title = Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008)
|chapter = Appendix – Publication Dates of the MPCs
|last = Schmadel |first=Lutz D.
|publisher = Springer Berlin Heidelberg
|page = 221
|isbn = 978-3-642-01964-7
|doi = 10.1007/978-3-642-01965-4}}</ref>

<ref name="geneva-obs">{{cite web
|title = Asteroids and comets rotation curves – (2023) Asaph
|last = Behrend |first = Raoul
|publisher = [[Geneva Observatory]]
|url = http://obswww.unige.ch/~behrend/page4cou.html#002023
|access-date = 6 July 2017}}</ref>

<ref name="Masiero-2011">{{cite journal
|display-authors = 6
|first1 = Joseph R. |last1 = Masiero
|first2 = A. K. |last2 = Mainzer
|first3 = T. |last3 = Grav
|first4 = J. M. |last4 = Bauer
|first5 = R. M. |last5 = Cutri
|first6 = J. |last6 = Dailey
|first7 = P. R. M. |last7 = Eisenhardt
|first8 = R. S. |last8 = McMillan
|first9 = T. B. |last9 = Spahr
|first10 = M. F. |last10 = Skrutskie
|first11 = D. |last11 = Tholen
|first12 = R. G. |last12 = Walker
|first13 = E. L. |last13 = Wright
|first14 = E. |last14 = DeBaun
|first15 = D. |last15 = Elsbury
|first16 = T. IV |last16 = Gautier
|first17 = S. |last17 = Gomillion
|first18 = A. |last18 = Wilkins
|date = November 2011
|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 20
|bibcode = 2011ApJ...741...68M
|doi = 10.1088/0004-637X/741/2/68
|arxiv = 1109.4096
|access-date= 6 July 2017}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (2023) Asaph
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2023%7CAsaph
|access-date = 6 July 2017}}</ref>


<ref name="AKARI">{{cite journal
<ref name="AKARI">{{cite journal
|display-authors = 6
|display-authors = 6
|author = Usui, Fumihiko
|first1 = Fumihiko |last1 = Usui
|author2 = Kuroda, Daisuke
|first2 = Daisuke |last2 = Kuroda
|author3 = Müller, Thomas G.
|first3 = Thomas G. |last3 = Müller
|author4 = Hasegawa, Sunao
|first4 = Sunao |last4 = Hasegawa
|author5 = Ishiguro, Masateru
|first5 = Masateru |last5 = Ishiguro
|author6 = Ootsubo, Takafumi
|first6 = Takafumi |last6 = Ootsubo
|author7 = Ishihara, Daisuke
|first7 = Daisuke |last7 = Ishihara
|author8 = Kataza, Hirokazu
|first8 = Hirokazu |last8 = Kataza
|author9 = Takita, Satoshi
|first9 = Satoshi |last9 = Takita
|author10 = Oyabu, Shinki
|first10 = Shinki |last10 = Oyabu
|author11 = Ueno, Munetaka
|first11 = Munetaka |last11 = Ueno
|author12 = Matsuhara, Hideo
|first12 = Hideo |last12 = Matsuhara
|author13 = Onaka, Takashi
|first13 = Takashi |last13 = Onaka
|date = October 2011
|date = October 2011
|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011PASJ...63.1117U
|journal = Publications of the Astronomical Society of Japan
|journal = Publications of the Astronomical Society of Japan
|volume = 63
|volume = 63
Line 86: Line 166:
|bibcode = 2011PASJ...63.1117U
|bibcode = 2011PASJ...63.1117U
|doi = 10.1093/pasj/63.5.1117
|doi = 10.1093/pasj/63.5.1117
}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=2023 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref>
|access-date= October 2015 }}</ref>


<ref name="WISE">{{cite journal
<ref name="WISE">{{cite journal
|display-authors = 6
|display-authors = 6
|author = Mainzer, A.
|first1 = A. |last1 = Mainzer
|author2 = Grav, T.
|first2 = T. |last2 = Grav
|author3 = Masiero, J.
|first3 = J. |last3 = Masiero
|author4 = Hand, E.
|first4 = E. |last4 = Hand
|author5 = Bauer, J.
|first5 = J. |last5 = Bauer
|author6 = Tholen, D.
|first6 = D. |last6 = Tholen
|author7 = McMillan, R. S.
|first7 = R. S. |last7 = McMillan
|author8 = Spahr, T.
|first8 = T. |last8 = Spahr
|author9 = Cutri, R. M.
|first9 = R. M. |last9 = Cutri
|author10 = Wright, E.
|first10 = E. |last10 = Wright
|author11 = Watkins, J.
|first11 = J. |last11 = Watkins
|author12 = Mo, W.
|first12 = W. |last12 = Mo
|author13 = Maleszewski, C.
|first13 = C. |last13 = Maleszewski
|date = November 2011
|date = November 2011
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M
|journal = The Astrophysical Journal
|journal = The Astrophysical Journal
|volume = 741
|volume = 741
|issue = 2
|issue = 2
|pages = 25
|page = 25
|bibcode = 2011ApJ...741...90M
|bibcode = 2011ApJ...741...90M
|doi = 10.1088/0004-637X/741/2/90
|doi = 10.1088/0004-637X/741/2/90
|access-date= October 2015 |arxiv = 1109.6407 }}</ref>
|arxiv = 1109.6407}}</ref>


<ref name="Masiero-2012">{{cite journal
<ref name="Masiero-2012">{{cite journal
|display-authors = 6
|author = Masiero, Joseph R.
|author2 = Mainzer, A. K.
|first1 = Joseph R. |last1 = Masiero
|author3 = Grav, T.
|first2 = A. K. |last2 = Mainzer
|author4 = Bauer, J. M.
|first3 = T. |last3 = Grav
|author5 = Cutri, R. M.
|first4 = J. M. |last4 = Bauer
|author6 = Nugent, C.
|first5 = R. M. |last5 = Cutri
|author7 = Cabrera, M. S.
|first6 = C. |last6 = Nugent
|first7 = M. S. |last7 = Cabrera
|date = November 2012
|date = November 2012
|title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids
|title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids
Line 128: Line 208:
|volume = 759
|volume = 759
|issue = 1
|issue = 1
|pages = 5
|page = 5
|bibcode = 2012ApJ...759L...8M
|bibcode = 2012ApJ...759L...8M
|doi = 10.1088/2041-8205/759/1/L8
|doi = 10.1088/2041-8205/759/1/L8
|access-date= October 2015 |arxiv = 1209.5794 }}</ref>
|arxiv = 1209.5794
|access-date= 6 July 2017}}</ref>


<ref name="Warner-2003c">{{cite journal
<ref name="Warner-2003c">{{Cite journal
|author = Warner, Brian D.
|author = Warner, Brian D.
|date = September 2003
|date = September 2003
|title = Lightcurve analysis of asteroids 331, 795, 886, 1266, 2023, 3285, and 3431
|title = Lightcurve analysis of asteroids 331, 795, 886, 1266, 2023, 3285, and 3431
Line 141: Line 222:
|volume = 30
|volume = 30
|issue = 3
|issue = 3
|pages = 61–64
|pages = 61–64
|issn = 1052-8091
|issn = 1052-8091
|bibcode = 2003MPBu...30...61W
|bibcode = 2003MPBu...30...61W
|access-date= October 2015 }}</ref>
|access-date= 6 July 2017}}</ref>


<ref name="Warner-2010j">{{cite journal
<ref name="Warner-2010j">{{Cite journal
|author = Warner, Brian D.
|author = Warner, Brian D.
|date = October 2010
|date = October 2010
|title = Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory
|title = Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory
Line 154: Line 235:
|volume = 37
|volume = 37
|issue = 4
|issue = 4
|pages = 150–151
|pages = 150–151
|issn = 1052-8091
|issn = 1052-8091
|bibcode = 2010MPBu...37..150W
|bibcode = 2010MPBu...37..150W
|access-date= October 2015 }}</ref>
|access-date= 6 July 2017}}</ref>

<ref name="lcdb">{{cite web
|title=LCDB Data for (2023) Asaph
|publisher=Asteroid Lightcurve Database (LCDB)
|url=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2023%7CAsaph
|accessdate=October 2015}}</ref>

<ref name="geneva-obs">{{cite web
|title=Asteroids and comets rotation curves (2023) Asaph
|last=Behrend |first=Raoul
|publisher=Geneva Observatory
|url=http://obswww.unige.ch/~behrend/page4cou.html#002023
|accessdate=October 2015}}</ref>

<ref name="MPC-Asaph">{{cite web
|title=2023 Asaph (1952 SA)
|work=Minor Planet Center
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=2023
|accessdate=October 2015}}</ref>


}} <!-- end of reflist -->
}} <!-- end of reflist -->


== External links ==
* [http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2023|Asaph Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info])
* [https://books.google.se/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* {{JPL small body|title=2023 Asaph (1952 SA)|id=2002023}}



{{Minor planets navigator|2022 West|2024 McLaughlin}}
{{Minor planets navigator |2022 West |number=2023 |2024 McLaughlin}}
{{Small Solar System bodies}}
{{Small Solar System bodies}}
{{Authority control}}


{{DEFAULTSORT:Asaph}}
{{DEFAULTSORT:Asaph}}
[[Category:Main-belt asteroids|002023]]
[[Category:Background asteroids|002023]]
[[Category:Numbered minor planets|002023]]
[[Category:Discoveries by Indiana University (Indiana Asteroid Program)|002023]]
[[Category:Asteroids named for people]]
[[Category:Named minor planets]]
[[Category:Astronomical objects discovered in 1952|19520627]]
[[Category:Astronomical objects discovered in 1952|19520916]]
[[Category:Discoveries by the Goethe Link Observatory|002023]]
[[Category:Discoveries by Indiana University|002023]]


{{Beltasteroid-stub}}

Latest revision as of 00:35, 8 September 2024

2023 Asaph
Discovery [1]
Discovered byIndiana University
(Indiana Asteroid Program)
Discovery siteGoethe Link Obs.
Discovery date16 September 1952
Designations
(2023) Asaph
Named after
Asaph Hall
(American astronomer)[2]
1952 SA
main-belt · (outer)[3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc64.53 yr (23,571 days)
Aphelion3.6816 AU
Perihelion2.0703 AU
2.8760 AU
Eccentricity0.2801
4.88 yr (1,781 days)
98.697°
0° 12m 7.56s / day
Inclination22.352°
3.1290°
357.53°
Physical characteristics
Dimensions19.678±0.264 km[4][5]
20.56±0.43 km[6]
21.29±0.40 km[7]
25.44 km (calculated)[3]
3.87±0.02 h[8][a]
4.74±0.01 h[9]
9.19±0.05 h[10]
0.057 (assumed)[3]
0.090±0.004[7]
0.096±0.018[6][5]
0.1045±0.0204[4]
C [3]
11.6[4][6][7] · 11.7[1][3]

2023 Asaph, provisional designation 1952 SA, is a dark asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter.[6] It was discovered on 16 September 1952, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States.[11]

Orbit and classification

[edit]

Asaph orbits the Sun in the outer main-belt at a distance of 2.1–3.7 AU once every 4 years and 11 months (1,781 days). Its orbit has an eccentricity of 0.28 and an inclination of 22° with respect to the ecliptic.[1] The asteroid's observation arc begins with its official discovery observation Goethe Link.[11]

Physical characterization

[edit]

In November 2001, a rotational lightcurve of Asaph was obtained from photometric observations by American astronomer Brian Warner. Lightcurve analysis gave a rotation period of 4.74 hours with a low brightness variation of 0.06 magnitude (U=2-).[9] Upon re-examination of the revised data set, Warner constructed a new, ambiguous lightcurve with two possible period solutions of 3.87 and 6.28 hours (U=2-).[8][a] These observations supersede a period of 9.19 hours derived from two fragmentary lightcurves obtained in 2001 and 2006, respectively (U=1/1).[10]

Diameter and albedo

[edit]

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Asaph measures between 19.678 and 21.29 kilometers in diameter and its surface has an albedo between 0.09 and 0.1045.[4][5][6][7]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a larger diameter of 25.44 kilometers based on an absolute magnitude of 11.7.[3]

Naming

[edit]

This minor planet was named in memory of American astronomer Asaph Hall (1829–1907), who discovered the Martian satellites, Phobos and Deimos.[2] The official naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4238).[12]

Notes

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  1. ^ a b Lightcurve plot of 2023 Asaph, Palmer Divide Observatory, Brian Warner (2001). The lightcurve is ambiguous with two possible period solutions of 6.28±0.05 and 3.87±0.02 hours.

References

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  1. ^ a b c d "JPL Small-Body Database Browser: 2023 Asaph (1952 SA)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 6 July 2017.
  2. ^ a b Schmadel, Lutz D. (2007). "(2023) Asaph". Dictionary of Minor Planet Names – (2023) Asaph. Springer Berlin Heidelberg. p. 164. doi:10.1007/978-3-540-29925-7_2024. ISBN 978-3-540-00238-3.
  3. ^ a b c d e f "LCDB Data for (2023) Asaph". Asteroid Lightcurve Database (LCDB). Retrieved 6 July 2017.
  4. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 6 July 2017.
  6. ^ a b c d e Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 6 July 2017.
  7. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
  8. ^ a b Warner, Brian D. (October 2010). "Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 37 (4): 150–151. Bibcode:2010MPBu...37..150W. ISSN 1052-8091. Retrieved 6 July 2017.
  9. ^ a b Warner, Brian D. (September 2003). "Lightcurve analysis of asteroids 331, 795, 886, 1266, 2023, 3285, and 3431". The Minor Planet Bulletin. 30 (3): 61–64. Bibcode:2003MPBu...30...61W. ISSN 1052-8091. Retrieved 6 July 2017.
  10. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2023) Asaph". Geneva Observatory. Retrieved 6 July 2017.
  11. ^ a b "2023 Asaph (1952 SA)". Minor Planet Center. Retrieved 6 July 2017.
  12. ^ Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.


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