Registry · deep sky

ACO 2256

ClG SIMBAD ClG 928 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: 17h 03m 37.54s
Declination: +78° 37′ 22.8″
Galactic l, b: 110.99, 31.78
Redshift z: 0.0583
Radial velocity: 16,969 km/s
Angular size: 12′ × 12′

Also known as

36 identifiers

1ES 1706+78.71H 1706+7861M 1706+7851RXS J170351.0+7838352A 1705+7862E 1706.9+78432E 38422MAXI J1704+7852U 1706+783A 1709+7873U 1706+784U 1707+78ACO 2256BAX 255.9314+78.7174ClG 1706.5+7847[F81] 367FR 108H 1707+788INTREF 739MCXC J1703.8+7838NSC J170527+783328PBC J1704.0+7836PLCKESZ G110.98+31.73PSZ1 G110.99+31.74PSZ2 G110.98+31.73PSZRX G111.01+31.76RBS 1624RX J1703.8+7838RXC J1703.8+7838RXGCC 694SRGA J170337.5+783723SWIFT J1704.3+7838WBL 632XCLASS 2083XSS J17050+7838[B2017] 2462

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
NGC 6331	GtowardsGroup	21.82″	—
Z 355-24	GtowardsCl	26.92″	—
LEDA 59513	RadioG	40.19″	—
2MASX J17035650+7837357	GtowardsCl	57.77″	—
Z 355-26	GtowardsCl	108.2″	—
2MASX J17030138+7836509	GtowardsCl	111.4″	—
LEDA 59495	RadioG	135.1″	—
LEDA 59520	RadioG	153″	—
Z 355-27	RadioG	160″	—
2MASX J17044384+7837220	GtowardsCl	196.2″	—
2MASX J17031174+7840298	GtowardsCl	202.1″	—

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-2256 · Registry entry updated 2026-08-14.