Registry · deep sky

AT 2021biy

Transient SIMBAD ev 14 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 04.02s
Declination: +32° 32′ 07.9″
Galactic l, b: 142.96, 84.22
Redshift z: 0.002021
Radial velocity: 605.27 km/s

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
[SG2009] X3	HighMassXBin	47.1″	—
NGC 4631	GtowardsCl	54.8″	9.19
[CHP2004] J124157.4+323203	X	85.42″	—
2CXO J124211.1+323236	HighMassXBin	93.93″	—
[SST2011] J124155.56+323216.9	HighMassXBin	107.4″	—
[LB2005] NGC 4631 ULX1	ULX Candidate	108.9″	—
[VP96] H10	Star	120.9″	—
NGC 4627	GtowardsGroup	146.2″	12.43
[CHP2004] J124216.0+323250	X	157.2″	—
[WMR2006] NGC4631 XMM3	X	210.5″	—
2XMM J124205.1+323634	AGN Candidate	267.3″	—

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/at-2021biy · Registry entry updated 2026-08-14.