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{{Short description|Main-belt asteroid}}
{{Infobox Planet
{{Use dmy dates|date=August 2018}}
| minorplanet = yes
{{Infobox planet
| width = 25em
| minorplanet = yes
| bgcolour = #FFFFC0
| name = 74503 Madola
| apsis =
| background = #D6D6D6
| name = Madola
| symbol =
| image =
| image =
| image_size =
| caption =
| caption =
| discovery_ref = &thinsp;<ref name="jpldata" />
| discovery = yes
| discoverer = [[Denis Bergeron|D. Bergeron]]
| discovery_ref =
| discovery_site = [[Val-des-Bois Observatory|Val-des-Bois Obs.]]
| discoverer = Denis Bergeron
| discovered = 23 February 1999
| discovery_site = Val-des-Bois ([[Québec]])
| mpc_name = (74503) Madola
| discovered = March 22, 1999
| alt_names = {{mp|1999 DN|4}}
| designations = yes
| pronounced =
| mp_name = 74503
| named_after = Christian Marois<br />René Doyon<br />David Lafrenière<br />{{nowrap|{{small|(Canadian astronomers)}}<ref name="MPC-object" />}}
| alt_names = 1999 DN4
| mp_category = [[main-belt]]{{·}}{{small|([[Kirkwood gap|outer]])}}<br />[[Background asteroid|background]]&thinsp;<ref name="AstDys-object" />
| mp_category =
| orbit_ref =
| orbit_ref = &thinsp;<ref name="jpldata" />
| epoch = 4 September 2017 ([[Julian day|JD]] 2458000.5)
| epoch = June 18, 2009
| uncertainty = 0
| aphelion = 3.5776331
| observation_arc = 22.36 yr (8,166 days)
| perihelion = 2.4452093
| aphelion = 3.5703 [[Astronomical unit|AU]]
| semimajor = 3.0114212
| perihelion = 2.4599 AU
| eccentricity = 0.1880215
| semimajor = 3.0151 AU
| period = 1908.7791274
| eccentricity = 0.1841
| avg_speed =
| period = 5.24 [[Julian year (astronomy)|yr]] (1,912 days)
| inclination = 17.18641
| mean_anomaly = 163.66[[Degree (angle)|°]]
| asc_node = 357.19118
| mean_motion = {{Deg2DMS|0.1883|sup=ms}} / day
| mean_anomaly = 317.91212
| inclination = 17.177°
| arg_peri = 201.06986
| asc_node = 357.01°
| satellites =
| arg_peri = 200.95°
| physical_characteristics =
| mean_diameter = {{val|4.481|0.179|u=km}}<ref name="Masiero-2011" />
| dimensions =
| mass =
| rotation =
| albedo = {{val|0.085|0.012}}<ref name="Masiero-2011" />
| density =
| surface_grav =
| spectral_type =
| abs_magnitude = 15.3<ref name="jpldata" />
| escape_velocity =
| sidereal_day =
| axial_tilt =
| pole_ecliptic_lat =
| pole_ecliptic_lon =
| albedo =
| temperatures=
| temp_name1 =
| mean_temp_1 =
| max_temp_1 =
| temp_name2 =
| max_temp_2 =
| spectral_type =
| abs_magnitude = 15.0
}}
}}


'''74503 Madola''' (1999 DN4) is a [[Asteroid belt|main-belt]] [[asteroid]] discovered on February 23, 1999 by Denis Bergeron at Val-des-Bois(Quebec).
'''74503 Madola''' ([[Minor planet provisional designation|provisional designation]] '''{{mp|1999 DN|4}}''') is a background [[asteroid]] from the outer region of the [[asteroid belt]], approximately 4.5 kilometers in diameter. It was discovered on 23 February 1999, by Canadian astronomer [[Denis Bergeron]] at the [[Val-des-Bois Observatory]] in Quebec, Canada. The asteroid was named for the three Canadian astronomers Christian Marois, René Doyon and David Lafrenière.<ref name="MPC-object" />


== Orbit and classification ==
In mid-2009, it was officially named Madola by the [[International Astronomical Union]], in honor of Christian Marois (b. 1974), René Doyon (b. 1963) and David Lafrenière (b. 1978), who developed instruments and techniques that allowed the first direct photograph of an extrasolar planetary system, consisting of three planets orbiting the star [[HR 8799]] in [[Pegasus (constellation)|Pegasus]].
Madola is a non-[[Asteroid family|family]] from the main belt's [[Background asteroid|background population]].<ref name="AstDys-object" /> It orbits the Sun in the [[Kirkwood gap|outer]] asteroid belt at a distance of 2.5–3.6&nbsp;[[Astronomical unit|AU]] once every 5 years and 3 months (1,912 days; [[semi-major axis]] of 3.02&nbsp;AU). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.18 and an [[orbital inclination|inclination]] of 17[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> The body's [[observation arc]] begins with a [[precovery]] taken by [[Spacewatch]] in April 1994, almost 6 years prior to its official discovery observation at Val-des-Bois.<ref name="MPC-object" />


== Physical characteristics ==
Doyon was director of the [[Mont Mégantic Observatory|Mont-Mégantic Observatory]] in Québec; Marois and Lafrenière were postdoctoral fellows at the [[Herzberg Institute of Astrophysics]] and the [[University of Toronto]].


=== Diameter and albedo ===
==External links==
According to the survey carried out by the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]], Madola measures 4.481 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] of 0.085.<ref name="Masiero-2011" />
* http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=madola;orb=0;cov=0;log=0;cad=0
* http://www.astrosurf.com/d_bergeron/astronomie/Bibliotheque/Decouvertes_asteroides/decouvertes_asteroides.htm (in French)


=== Rotation period ===
{{DEFAULTSORT:Madola}}
As of 2018, no rotational [[lightcurve]] of Madola has been obtained from photometric observations. The body's [[rotation period]], [[Poles of astronomical bodies|pole]] and shape remain unknown.<ref name="jpldata" /><ref name="lcdb" />
[[Category:Main Belt asteroids]]
[[Category:Astronomical objects discovered in 1999]]


== Naming ==
{{beltasteroid-stub}}
This [[minor planet]] was named in honor of Canadian astronomers Christian Marois (born 1974), René Doyon (born 1963) and David Lafrenière (born 1978). They had developed instruments and techniques that allowed them to be the first to directly photograph an extrasolar planetary system, namely the first [[HR 8799#Planetary system|three planets]] orbiting the star [[HR&nbsp;8799]] in the constellation [[Pegasus (constellation)|Pegasus]]. At the time of naming this asteroid, René Doyon was the director of the Canadian [[Mont Mégantic Observatory]], while Christian Marois and David Lafrenière were postdocs at the [[Herzberg Institute of Astrophysics]] and the [[University of Toronto]].


The official naming citation was published by the [[Minor Planet Center]] on 9 April 2009 ({{small|[[Minor Planet Circulars|M.P.C.]] 65712}}).<ref name="MPC-Circulars-Archive" />
[[fa:سیارک ۷۴۵۰۳]]

[[fr:(74503) Madola]]
== References ==
[[pl:74503 Madola]]
{{reflist|30em|refs=

<ref name="jpldata">{{cite web
|type = 2016-08-10 last obs.
|title = JPL Small-Body Database Browser: 74503 Madola (1999 DN4)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2074503
|publisher = [[Jet Propulsion Laboratory]]
|access-date = 1 February 2018}}</ref>

<ref name="MPC-object">{{cite web
|title = 74503 Madola (1999 DN4)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=74503
|access-date = 1 February 2018}}</ref>

<ref name="MPC-Circulars-Archive">{{cite web
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 1 February 2018}}</ref>

<ref name="AstDys-object">{{cite web
|title = Asteroid 74503 Madola – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=74503
|access-date= 29 October 2019}}</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
|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
}}</ref>

<ref name="lcdb">{{cite web
|title = LCDB Data for (74503) Madola
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=74503%7CMadola
|access-date = 2 February 2018}}</ref>

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

== External links ==
* [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
* [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs070001.html Discovery Circumstances: Numbered Minor Planets (70001)-(75000)] – Minor Planet Center
* [http://www.astrosurf.com/d_bergeron/astronomie/Bibliotheque/Decouvertes_asteroides/decouvertes_asteroides.htm#D%C3%A9couverte%20%20troisi%C3%A8me%20ast%C3%A9ro%C3%AFd Découverte d'un troisième astéroïde 74503 (1999 DN4) Madola], Denis Bergeron at astrosurf.com {{in lang|fr}}
* {{AstDys|74503}}
* {{JPL small body}}

{{Minor planets navigator | |number=74503 | }}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:Madola}}
[[Category:Background asteroids|074503]]
[[Category:Named minor planets]]
[[Category:Astronomical objects discovered in 1999|19990223]]

Latest revision as of 14:36, 17 August 2024

74503 Madola
Discovery [1]
Discovered byD. Bergeron
Discovery siteVal-des-Bois Obs.
Discovery date23 February 1999
Designations
(74503) Madola
Named after
Christian Marois
René Doyon
David Lafrenière
(Canadian astronomers)[2]
1999 DN4
main-belt · (outer)
background [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc22.36 yr (8,166 days)
Aphelion3.5703 AU
Perihelion2.4599 AU
3.0151 AU
Eccentricity0.1841
5.24 yr (1,912 days)
163.66°
0° 11m 17.88s / day
Inclination17.177°
357.01°
200.95°
Physical characteristics
4.481±0.179 km[4]
0.085±0.012[4]
15.3[1]

74503 Madola (provisional designation 1999 DN4) is a background asteroid from the outer region of the asteroid belt, approximately 4.5 kilometers in diameter. It was discovered on 23 February 1999, by Canadian astronomer Denis Bergeron at the Val-des-Bois Observatory in Quebec, Canada. The asteroid was named for the three Canadian astronomers Christian Marois, René Doyon and David Lafrenière.[2]

Orbit and classification

[edit]

Madola is a non-family from the main belt's background population.[3] It orbits the Sun in the outer asteroid belt at a distance of 2.5–3.6 AU once every 5 years and 3 months (1,912 days; semi-major axis of 3.02 AU). Its orbit has an eccentricity of 0.18 and an inclination of 17° with respect to the ecliptic.[1] The body's observation arc begins with a precovery taken by Spacewatch in April 1994, almost 6 years prior to its official discovery observation at Val-des-Bois.[2]

Physical characteristics

[edit]

Diameter and albedo

[edit]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Madola measures 4.481 kilometers in diameter and its surface has an albedo of 0.085.[4]

Rotation period

[edit]

As of 2018, no rotational lightcurve of Madola has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[1][5]

Naming

[edit]

This minor planet was named in honor of Canadian astronomers Christian Marois (born 1974), René Doyon (born 1963) and David Lafrenière (born 1978). They had developed instruments and techniques that allowed them to be the first to directly photograph an extrasolar planetary system, namely the first three planets orbiting the star HR 8799 in the constellation Pegasus. At the time of naming this asteroid, René Doyon was the director of the Canadian Mont Mégantic Observatory, while Christian Marois and David Lafrenière were postdocs at the Herzberg Institute of Astrophysics and the University of Toronto.

The official naming citation was published by the Minor Planet Center on 9 April 2009 (M.P.C. 65712).[6]

References

[edit]
  1. ^ a b c d e "JPL Small-Body Database Browser: 74503 Madola (1999 DN4)" (2016-08-10 last obs.). Jet Propulsion Laboratory. Retrieved 1 February 2018.
  2. ^ a b c "74503 Madola (1999 DN4)". Minor Planet Center. Retrieved 1 February 2018.
  3. ^ a b "Asteroid 74503 Madola – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
  4. ^ 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.
  5. ^ "LCDB Data for (74503) Madola". Asteroid Lightcurve Database (LCDB). Retrieved 2 February 2018.
  6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 1 February 2018.
[edit]
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