Registry · deep sky

V* BI Cyg

RedSG SIMBAD s*r M4Iab 109 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: 20h 21m 21.89s
Declination: +36° 55′ 55.7″
Galactic l, b: 75.32, 0.1118
Magnitude V: 8.4
Parallax: 0.3541 mas
Redshift z: -2.275e-05
Radial velocity: -6.82 km/s
Proper motion: -2.751, -5.459 mas/yr

Also known as

19 identifiers

2MASS J20212192+3655555AAVSO 2017+36BAN 23.1919BD+36 4025V* BI CygCCDM J20215+3656AGaia DR2 2057564148278709760Gaia DR3 2057564148278709760GEN# +0.03604025GSC 02684-00522IDS 20176+3637 AIRAS 20194+3646IRC +40408JP11 158RAFGL 2559TIC 13249363TYC 2684-522-1UBV M 2712WDS J20214+3656A

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
HD 193928	WolfRayet*	125.6″	9.78
LS II +36 67	Star	214.9″	11
HD 193815	Star	307.3″	8.46
PSR J2021+3651	Pulsar	352″	—
Northern Coalsack	DarkNeb	358.4″	—
ATO J305.4783+36.9118	EclBin	401.4″	13.32
2MASS J20215223+3700198	RGB*	449.4″	—
HD 229099	Star	474.5″	10.33
HD 229043	Star	482.3″	10.04
2MASS J20204275+3658104	RGB*	488.1″	—

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/v-bi-cyg · Registry entry updated 2026-08-14.