Registry · deep sky

Cas A

SNRemnant SIMBAD SNR 3,077 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: 23h 23m 26.02s
Declination: +58° 48′ 40.7″
Galactic l, b: 111.74, -2.135
Magnitude V: 14.3
Angular size: 5′ × 5′

Also known as

45 identifiers

1ES 2321+58.51FGL J2323.4+58491FHL J2323.3+58491H 2321+5851RXS J232325.4+5848382E 2321.1+58332E 47242FGL J2323.4+58492FHL J2323.4+58482U 2321+583A 2321+5853C 4613C 461.03CR 4613FGL J2323.4+58493FHL J2323.4+58483U 2321+584C 58.404FGL J2323.4+58494U 2321+588C 2321+585AJG 109BWE 2321+5832CTA 105CTB 110DA 601DB 123H 2334+60INTREF 1108NRAO 711PBC J2323.3+5849SN 1667SN 1671SN 1680SNR G111.7-02.1SRGA J232326.0+584841SWIFT J2323.2+5848SWIFT J2323.3+5849TeV J2323+588W 81Cas ACassiopeia A[DGW65] 148GAL 111.7-02.1[KRL2007b] 402

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
[BWW84] 8	MolCld	11.38″	—
CXOU J232327.8+584842	X	14.4″	—
[BC86c] J	MolCld	55.68″	—
[BC86c] B	MolCld	79.66″	—
[BC86c] K	MolCld	85.88″	—
IRAS 23211+5833	Infrared	94.81″	—
[BC86c] I	MolCld	132.2″	—
EM* GGR 139	EmLine*	315.9″	11.38
IRAS 23215+5826	Infrared	370.8″	—
Gaia DR3 2010484670980162176	WhiteDwarf	490.5″	—
Gaia DR3 2009727244907740416	WhiteDwarf	522″	—

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/cas-a · Registry entry updated 2026-08-14.