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Coordinates: Sky map 02h 41m 55.1s, +59° 36′ 15″
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{{short description|Galaxy in the constellation Cassiopeia}}
{{Infobox galaxy
{{Infobox galaxy
| name = Maffei 2
| name = Maffei 2
| image = [[Image:Maf2atlas.jpg|220px]]
| image = Maf2atlas.jpg
| image_size = 220px
| caption = Image by Two Micron All Sky Survey (2MASS)
| epoch = [[Epoch (astronomy)#Julian years and J2000|J2000]]
| epoch = [[Epoch (astronomy)#Julian years and J2000|J2000]]
| type = SAB(rs)bc<ref name="ned">{{cite web
| type = SAB(rs)bc<ref name="ned">{{cite web
| title=NASA/IPAC Extragalactic Database
| work=NASA/IPAC Extragalactic Database
| work=Results for Maffei 2
| title=NED results for object Maffei 2
| url=http://nedwww.ipac.caltech.edu/
| url=http://nedwww.ipac.caltech.edu/
| accessdate=2006-11-25 }}</ref>
| access-date=2006-11-25 }}</ref>
| ra = {{RA|02|41|55.1}}<ref name="ned" />
| ra = {{RA|02|41|55.1}}<ref name="ned" />
| dec = {{DEC|+59|36|15}}<ref name="ned" />
| dec = {{DEC|+59|36|15}}<ref name="ned" />
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| z = -17 ± 5 [[kilometer|km]]/[[second|s]]<ref name="ned" />
| z = -17 ± 5 [[kilometer|km]]/[[second|s]]<ref name="ned" />
| appmag_v = 16.0<ref name="ned" />
| appmag_v = 16.0<ref name="ned" />
| size_v = 5&prime;.82 &times; 1&prime;.57<ref name="ned" />
| size_v = 15.2{{prime}} × 7.0{{prime}}<ref name="ned" />
| constellation name = [[Cassiopeia (constellation)|Cassiopeia]]
| constellation name = [[Cassiopeia (constellation)|Cassiopeia]]
| names = UGCA 39,<ref name="ned" /> [[Principal Galaxies Catalogue|PGC]] 10217,<ref name="ned" /> [[Sharpless catalog|Sharpless]] 197
| names = UGCA 39,<ref name="ned" /> [[Principal Galaxies Catalogue|PGC]] 10217,<ref name="ned" /> [[Sharpless catalog|Sharpless]] 197
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| pages = 178–188
| pages = 178–188
| bibcode = 2005AJ....129..178K
| bibcode = 2005AJ....129..178K
| doi = 10.1086/426368 |arxiv = astro-ph/0410065 | s2cid=119385141
| doi = 10.1086/426368 |arxiv = astro-ph/0410065 }}</ref> in the [[constellation]] [[Cassiopeia (constellation)|Cassiopeia]]. Maffei 2 and [[Maffei 1]] were both discovered by [[Paolo Maffei]] in 1968 from their infrared emission. Maffei 2 lies in the [[Zone of Avoidance]] and is about 99.5% obscured by the [[Milky Way]]'s foreground dust clouds,<ref>{{cite web|title=The Hidden Galaxy|url=http://www.nasa.gov/mission_pages/spitzer/multimedia/pia13789.html|publisher=NASA|accessdate=2011-05-03}}</ref> and as a result is barely detectable at optical wavelengths. It had been suggested soon after its discovery that Maffei 2 may be a member of the [[Local Group]], but it is now thought to be a member of another nearby group, the [[IC 342/Maffei Group]], the [[galaxy group]] that is the closest to the Local Group.
}}</ref> in the [[constellation]] [[Cassiopeia (constellation)|Cassiopeia]]. Maffei 2 and [[Maffei 1]] were both discovered by [[Paolo Maffei]] in 1968 from their infrared emission. Maffei 2 lies in the [[Zone of Avoidance]] and is about 99.5% obscured by the [[Milky Way]]'s foreground dust clouds,<ref>{{cite web|title=The Hidden Galaxy|url=http://www.nasa.gov/mission_pages/spitzer/multimedia/pia13789.html|publisher=NASA|access-date=2011-05-03}}</ref> and as a result is barely detectable at optical wavelengths. It had been suggested soon after its discovery that Maffei 2 may be a member of the [[Local Group]], but it is now thought to be a member of another nearby group, the [[IC 342/Maffei Group]], the [[galaxy group]] that is the closest to the Local Group.

[[Image:Heart and Soul nebulae.jpg|thumb|left|Maffei 2 is the spiral galaxy near the bottom of this image.]]

{{-}}
{{Wide image|Maffei 1 and 2.jpg|650px|Maffei 2 is visible in this image.}}


==See also==
==See also==
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==External links==
==External links==
{{commonscat}}
* [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=Maffei+2&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2006&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0 '''SIMBAD''': UGCA 39 -- Galaxy]
* [http://www.seds.org/~spider/spider/LG/maffei2.html '''SEDS''': Spiral Galaxy Maffei 2]
* {{cite web | url=http://spider.seds.org/spider/LG/maffei2.html | title=Maffei 2 | publisher=SEDS | work=Spider }}
* [http://www.astr.ua.edu/gifimages/maffei2.html Maffei2]
* {{cite web | url=http://www.astr.ua.edu/gifimages/maffei2.html | title=Maffei 2 | publisher=University of Alabama | work=UA Astronomy }}
*[http://apod.nasa.gov/apod/ap100309.html Galaxies Beyond the Heart: Maffei 1 and 2] = [[Astronomy Picture of the Day]] 2010 March 9
* {{WikiSky|z=9}}
* {{WikiSky|z=9}}
* {{cite APOD | title=Galaxies Beyond the Heart: Maffei 1 and 2 | date=9 March 2010 }}
* {{cite simbad | title=UGCA 39 | accessdate=25 March 2018}}



{{Sh2 objects}}
{{Sh2 objects}}
{{Cassiopeia (constellation)}}
⚫
{{sky|02|41|55.1|+|59|36|15}}


⚫
{{sky|02|41|55.1|+|59|36|15}}
[[Category:Intermediate spiral galaxies]]
[[Category:Intermediate spiral galaxies]]
[[Category:IC 342/Maffei Group]]
[[Category:IC 342/Maffei Group]]
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[[Category:Sharpless objects]]
[[Category:Sharpless objects]]
[[Category:Astronomical objects discovered in 1968]]
[[Category:Astronomical objects discovered in 1968]]
[[Category:UGCA objects]]

Latest revision as of 21:24, 28 June 2023

Maffei 2
Image by Two Micron All Sky Survey (2MASS)
Observation data (J2000 epoch)
ConstellationCassiopeia
Right ascension02h 41m 55.1s[1]
Declination+59° 36′ 15″[1]
Redshift-17 ± 5 km/s[1]
Distance9.8 Mly[2]
Apparent magnitude (V)16.0[1]
Characteristics
TypeSAB(rs)bc[1]
Apparent size (V)15.2′ × 7.0′[1]
Other designations
UGCA 39,[1] PGC 10217,[1] Sharpless 197

Maffei 2 is an intermediate spiral galaxy about 10 million light-years away[2] in the constellation Cassiopeia. Maffei 2 and Maffei 1 were both discovered by Paolo Maffei in 1968 from their infrared emission. Maffei 2 lies in the Zone of Avoidance and is about 99.5% obscured by the Milky Way's foreground dust clouds,[3] and as a result is barely detectable at optical wavelengths. It had been suggested soon after its discovery that Maffei 2 may be a member of the Local Group, but it is now thought to be a member of another nearby group, the IC 342/Maffei Group, the galaxy group that is the closest to the Local Group.

See also

[edit]

References

[edit]
  1. ^ a b c d e f g h "NED results for object Maffei 2". NASA/IPAC Extragalactic Database. Retrieved 2006-11-25.
  2. ^ a b Karachentsev, I. D. (2005). "The Local Group and Other Neighboring Galaxy Groups". Astronomical Journal. 129 (1): 178–188. arXiv:astro-ph/0410065. Bibcode:2005AJ....129..178K. doi:10.1086/426368. S2CID 119385141.
  3. ^ "The Hidden Galaxy". NASA. Retrieved 2011-05-03.
[edit]
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