Registry · deep sky

* tau Oph

** SIMBAD ** F3IV 103 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: 18h 03m 04.92s
Declination: −08° 10′ 49.3″
Galactic l, b: 20.061, 6.87
Magnitude V: 4.79
Parallax: 19.48 mas
Redshift z: -0.00012805
Radial velocity: -38.39 km/s
Proper motion: 15.78, -37.79 mas/yr

Also known as

19 identifiers

1RXS J180304.6-0810492MASS J18030485-0810490* 69 OphADS 11005 ABBD-08 4549CCDM J18031-0811ABCSI-08 4549 4GJ 700.1HIC 88404HIP 88404IDS 17576-0811 ABIRAS 18003-0810** STF 2262AB* tau OphTD1 21485TIC 204010915UBV 15333uvby98 100164765WDS J18031-0811AB

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
* tau Oph A	SB*	0.02321″	5.27
* tau Oph B	Star	1.79″	5.86
* tau Oph C	Star	99.51″	11.3
ATO J270.7242-08.1657	LongPeriodV*	173″	—
2MASS J18030349-0807441	Star	186.1″	—
UCAC4 410-075848	Star	266.6″	—
HD 164828	Star	311.2″	8.58
2MASS J18024403-0809544	Star	314.8″	—
UCAC4 410-075864	Star	387.7″	—
ATO J270.8448-08.0937	EclBin	409.3″	—
2MASS J18033376-0805419	RGB*	527.1″	—

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/tau-oph · Registry entry updated 2026-08-14.