Registry · deep sky

NGC 4631

GtowardsCl SIMBAD GiC 1,160 papers

harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.

Right ascension: 12h 42m 08.01s
Declination: +32° 32′ 29.4″
Galactic l, b: 142.81, 84.22
Magnitude V: 9.19
Redshift z: 0.0020067
Radial velocity: 601 km/s
Angular size: 16.56′ × 3.139′

Also known as

45 identifiers

2E 1239.5+32482E 28262MASX J12420800+32322947C 1239+324887GB 123941.4+324853APG 281B2 1239+32B2.1 1239+32BWE 1239+3248CAIRNS J124208.00+323226.0EXSS 1239.6+3248GB2 1239+328GB6 B1239+3248IRAS 12396+3249IRAS F12396+3249ISOSS J12421+3232KPG 350KPG 350aKUG 1239+328BLEDA 42637LJHY 107[M98c] 123945.3+324905MITG J124203+3232NGC 4631NVSS J124208+323231OHIO N 366PSCz Q12396+3249SDSS J124207.23+323235.0[T76] 76BTC E22UGC 7865UZC J124208.0+323226Z 1239.7+3249Z 188-16[CAB95] IRAS F12396+3249[CHM2007] HDC 706 J124208.00+3232294[CHM2007] LDC 867 J124208.00+3232294[DFO95] 35[KOV2009] 64[KVB99] 31MCG+06-28-020[NKB95] N4631[SLK2004] 730[VDD93] 169Whale Galaxy

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
[SG2009] X3	HighMassXBin	29.85″	—
2CXO J124211.1+323236	HighMassXBin	39.77″	—
AT 2021biy	Transient	54.8″	—
[CHP2004] J124216.0+323250	X	103.1″	—
[VP96] H10	Star	111.5″	—
[CHP2004] J124157.4+323203	X	138.4″	—
NGC 4627	GtowardsGroup	153.8″	12.43
[SST2011] J124155.56+323216.9	HighMassXBin	157.9″	—
[LB2005] NGC 4631 ULX1	ULX Candidate	159.8″	—
2XMM J124205.1+323634	AGN Candidate	247.8″	—
[WMR2006] NGC4631 XMM3	X	251.9″	—

Provenance

where this card came from

Archive	Read at (UTC)	Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/ngc-4631 · Registry entry updated 2026-08-14.