| {{{name}}} | |
|---|---|
 SDSS拍摄的NGC 4221 | |
| 观测资料 （J2000 历元） | |
| 星座 | 天龙座 |
| 赤经 | 12h 15m 59.860s[1] |
| 赤纬 | +66° 13′ 50.90″[1] |
| 红移 | 0.00439[2] |
| 视向速度 | 1313 ± 3 km/s[2] |
| 距离 | 75.9百万光年（23.28百万秒差距）[3] |
| 类型 | (R)SB0+(r)[1] |
| 视大小 (V) | 1.347′ × 0.943′[2] |
| 其他名称 | |
| UGC 7288、MCG+11-15-040、PGC 39266[2] | |
| 参见：星系、星系列表 | |
NGC 4221是一个位于天龙座的透镜状星系，距离地球7590万光年[3]，1832年4月3日由约翰·赫歇尔发现[4]，属于NGC 4256星系群[5][6][7]。
参考
- ↑ 1.0 1.1 1.2 Results for object NGC 4221 (NGC 4221). NASA/IPAC Extragalactic Database. California Institute of Technology. [2021-04-18].
- ↑ 2.0 2.1 2.2 2.3 NGC 4221. SIMBAD. 斯特拉斯堡天文资料中心. [2021-04-18].
- ↑ 3.0 3.1 Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. Groups of Galaxies in the Two Micron All Sky Redshift Survey. The Astrophysical Journal. 2007, 655 (2): 790–813. Bibcode:2007ApJ...655..790C. arXiv:astro-ph/0610732
. doi:10.1086/510201.
- ↑ Seligman, Courtney. New General Catalogue objects: NGC 4200 - 4249. cseligman.com. [2021-04-18].
- ↑ Fouque, P.; Gourgoulhon, E.; Chamaraux, P.; Paturel, G. Groups of galaxies within 80 Mpc. II. The catalogue of groups and group members.. Astronomy and Astrophysics Supplement Series. 1992-05-01, 93: 211–233 [2022-07-05]. ISSN 0365-0138.
- ↑ Garcia, A. M. General study of group membership. II. Determination of nearby groups.. Astronomy and Astrophysics Supplement Series. 1993-07-01, 100: 47–90 [2022-07-05]. ISSN 0365-0138.
- ↑ Giuricin, Giuliano; Marinoni, Christian; Ceriani, Lorenzo; Pisani, Armando. Nearby Optical Galaxies: Selection of the Sample and Identification of Groups. The Astrophysical Journal. November 2000, 543 (1): 178–194 [2022-07-05]. ISSN 0004-637X. doi:10.1086/317070 （英语）.
外部链接
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