Registry · deep sky

ACO 1656

ClG SIMBAD ClG 5,188 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 59m 44.40s
Declination: +27° 54′ 44.9″
Galactic l, b: 56.485, 88
Redshift z: 0.0234
Radial velocity: 6,933.1 km/s
Angular size: 30′ × 30′

Also known as

49 identifiers

1ES 1257+28.21H 1257+2811M 1257+2811RXS J125947.9+2756362A 1257+2832E 1257.4+28122E 29322MAXI J1259+2792U 1257+283A 1257+2823U 1257+284U 1257+28ACO 1656BAX 194.9531+27.9807CAN 90CID 90ClG 1257.4+2815DB 88EXSS 1257.4+2815[F81] 253FR 76H 1256+27H 1257+283HMS 1257+2814IGR J12595+2755INTREF 534MCXC J1259.7+2756[N93] 109PBC J1259.5+2756PLCKESZ G057.33+88.01PSZ1 G057.84+87.98PSZ2 G057.80+88.00PSZRX G057.30+88.00RASSCALS NRGb226RBS 1198RX J1259.7+2756RXC J1259.7+2756RXGCC 479[S85] 222SWIFT J1259.7+2755X Com X-1XCLASS 1783XSS J12596+2759[AWK2020] 3[B2017] 1599Coma Cluster[KRL2007b] 128[KVC2005] 8[SPD2011] 67

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
NGC 4876	LINER	0.0285″	14.18
GMP 3156	Galaxy	47.29″	20.31
Z 160-233	Galaxy	52.26″	15.42
SDSS J125944.77+275537.1	LowSurfBrghtG	52.55″	19.73
[ARF2020] COMA 22 4810	LowSurfBrghtG	60.96″	20.62
CAIRNS J125948.34+275409.6	GtowardsCl	61.52″	19.25
[EDG2007] 239	GtowardsCl	74.9″	18.32
LEDA 1821341	Galaxy	76.57″	17.4
GMP 3196	GtowardsCl	81.82″	17.19
2MASX J12595013+2755292	GtowardsCl	87.74″	16.05
NGC 4875	GtowardsCl	88.05″	14.57

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-1656 · Registry entry updated 2026-08-14.