Registry · deep sky

ACO 400

ClG SIMBAD ClG 409 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: 02h 57m 37.40s
Declination: +06° 00′ 45.0″
Galactic l, b: 170.26, -44.95
Redshift z: 0.0232
Radial velocity: 6,874.5 km/s
Angular size: 20′ × 20′

Also known as

23 identifiers

1RXS J025732.7+0601072E 0255.0+05492E 6812MAXI J0259+060ACO 400BAX 044.4108+06.0333CAN 21CID 21ClG 0255.0+0550EXSS 0255.0+0548[F81] 75FR 25HMS 0255+0552MCXC J0257.6+0600RASSCALS SRGb161RBS 373RX J0257.5+0601RX J0257.7+0601RXC J0257.6+0600RXGCC 122[S85] 633WBL 90XCLASS 2110

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
3C 75B	BrightestCG	72.77″	—
3C 75	PairG	76.48″	—
3C 75A	RadioG	80.91″	—
2MASX J02573746+0602491	GtowardsCl	124.7″	—
[CCR2009] J025744.50+060202.2	Galaxy	131.1″	—
ATLAS 16dpb	Supernova	133.6″	—
Z 415-40	GtowardsGroup	139.5″	—
LEDA 74254	GtowardsCl	147.6″	—
2MASX J02574741+0601395	GtowardsCl	159.1″	—
LEDA 11196	GtowardsCl	176.9″	—
2MASX J02574558+0558312	GtowardsCl	181.4″	—

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/aco-400 · Registry entry updated 2026-08-14.