Registry · deep sky

NGC 3999

AGN Candidate SIMBAD AG? 13 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: 11h 57m 56.49s
Declination: +25° 04′ 05.8″
Galactic l, b: 219.67, 77.82
Redshift z: 0.01385
Radial velocity: 4,123.4 km/s
Angular size: 0.5197′ × 0.3041′

Also known as

10 identifiers

2MASX J11575647+2504062ECO 12562Gaia DR2 4004526562175003904Gaia DR3 4004526562175003904GASS 111049LEDA 37647NGC 3999SDSS J115756.49+250405.8Z 1155.4+2521Z 127-117

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
LEDA 4304240	EmissionG	93.89″	—
NGC 4005	LINER	268.7″	—
HD 103913	HighPM*	271.9″	8.28
NGC 4000	EmissionG	273.9″	—
BD+25 2441	**	370.3″	9.56
NGC 4011	EmissionG	407″	—
Mahtessian 150	GroupG	454.9″	—
LGG 261	GroupG	518.9″	—

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-3999 · Registry entry updated 2026-08-14.