NGC 4221
NGC 4221是一个位于天龙座的透鏡狀星系,距离地球7590万光年[3] ,1832年4月3日由約翰·赫歇爾发现[5],属于NGC 4256星系群[4][6][7]。
NGC 4221 | |
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![]() SDSS拍摄的NGC 4221 | |
观测资料(J2000 曆元) | |
星座 | 天龙座 |
赤经 | 12h 15m 59.860s[1] |
赤纬 | +66° 13′ 50.90″[1] |
紅移 | 0.00439[2] |
徑向速度 | 1313 ± 3 km/s[2] |
距离 | 75.9 Mly(23.28 Mpc)[3] |
属于 | NGC 4256星系群[4] |
视星等 (B) | 13.6[2] |
特征 | |
类型 | (R)SB0+(r)[1] |
大小 | 55,900 ly(17.15 kpc)[1] |
角直徑 (V) | 1.347′ × 0.943′[2] |
其他名称 | |
UGC 7288、MCG+11-15-040、PGC 39266[2] | |
参考
- ^ 1.0 1.1 1.2 1.3 Results for object NGC 4221 (NGC 4221). NASA/IPAC Extragalactic Database. California Institute of Technology. [2021-04-18]. (原始内容存档于2022-07-05).
- ^ 2.0 2.1 2.2 2.3 2.4 NGC 4221. SIMBAD. 斯特拉斯堡天文資料中心. [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.
- ^ 4.0 4.1 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. (原始内容存档于2022-04-20).
- ^ Seligman, Courtney. New General Catalogue objects: NGC 4200 - 4249. cseligman.com. [2021-04-18]. (原始内容存档于2019-02-09).
- ^ 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. (原始内容存档于2022-04-15).
- ^ 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. (原始内容存档于2021-11-05) (英语).
外部链接
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