Maffei 2: Difference between revisions
Content deleted Content added
mNo edit summary |
m convert special characters found by Wikipedia:Typo Team/moss (via WP:JWB) |
||
| (3 intermediate revisions by 3 users not shown) | |||
| Line 2: | Line 2: | ||
{{Infobox galaxy |
{{Infobox galaxy |
||
| name = Maffei 2 |
| name = Maffei 2 |
||
| image = |
| image = Maf2atlas.jpg |
||
| image_size = 220px |
| image_size = 220px |
||
| caption = Image by Two Micron All Sky Survey (2MASS) |
|||
| caption = Maffei 2 as recovered from data of LBT, Spitzer telescope. Stars not related to the galaxy have been edited out. |
|||
| 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 |
||
| Line 16: | Line 16: | ||
| 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 = 15.2 |
| 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 |
||
| Line 31: | Line 31: | ||
| pages = 178–188 |
| pages = 178–188 |
||
| bibcode = 2005AJ....129..178K |
| bibcode = 2005AJ....129..178K |
||
| doi = 10.1086/426368 |arxiv = astro-ph/0410065 | s2cid=119385141 |
|||
}}</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. |
|||
== Gallery == |
|||
<gallery> |
|||
Maf2atlas.jpg|Maffei 2 by Atlas |
|||
Heart and Soul nebulae.jpg|Maffei 2 is the spiral galaxy near the bottom of this image. |
|||
</gallery> |
|||
{{Wide image|Maffei 1 and 2.jpg|650px|Maffei 2 is visible in this image.}} |
|||
==See also== |
==See also== |
||
Latest revision as of 21:24, 28 June 2023
| Maffei 2 | |
|---|---|
 Image by Two Micron All Sky Survey (2MASS) | |
| Observation data (J2000 epoch) | |
| Constellation | Cassiopeia |
| Right ascension | 02h 41m 55.1s[1] |
| Declination | +59° 36′ 15″[1] |
| Redshift | -17 ± 5 km/s[1] |
| Distance | 9.8 Mly[2] |
| Apparent magnitude (V) | 16.0[1] |
| Characteristics | |
| Type | SAB(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]- ^ a b c d e f g h "NED results for object Maffei 2". NASA/IPAC Extragalactic Database. Retrieved 2006-11-25.
- ^ 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.
- ^ "The Hidden Galaxy". NASA. Retrieved 2011-05-03.
External links
[edit]
Wikimedia Commons has media related to Maffei 2.
- "Maffei 2". Spider. SEDS.
- "Maffei 2". UA Astronomy. University of Alabama.
- Maffei 2 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Nemiroff, R.; Bonnell, J., eds. (9 March 2010). "Galaxies Beyond the Heart: Maffei 1 and 2". Astronomy Picture of the Day. NASA.
- "UGCA 39". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 March 2018.
