7 Tauri
DSS image of 7 Tauri
Overlaid DSS image of 7 Tauri, 60' x 60' with north at top and west to the right

Aladin viewer for the region around 7 Tauri
7 Tau
Σ 412, BD+23 473, HD 22091, HR 1086, WDS J03344+2428, SAO 75999, GSC 01802-01524, HIP 16664

Type  Binary Star
Magnitude  6.58
Right Ascension  3h 34' 26.6"  (2000)
Declination  24° 27' 53" N
Constellation  Taurus
Description  Binary 6.70/8.56 0.8" 351°
Classification  A3IVs
Observing Notes

Andrew Cooper
Nov 13, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 136x
Seeing: 5 Transparency: 6 Moon: 0%

White, a 7th magnitude 0.8" companion is not visible

Andrew Cooper
Feb 20, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 61x
Seeing: 7 Transparency: 6 Moon: 0%

Modest white, no companion noted

Captain William Henry Smyth
Mar 18, 1833    No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827

A triple star, on the back of Taurus, about 3° to the np of the Pleiades. A 6, white; B 6½, pale yellow; C 11, bluish. This is a fine and very difficult object, being Σ's No. 412, "vicinissimæ." A and C point to a comes in the nf quadrant, and constituted 88 ♅. IV., but Sir William did not observe that A was double. It may have opened since. His measures of A and C were
    Pos. 66°45'  Dist. 19".833  Ep. 1783.77
It was then re-examined by H. and S., No. 363, with these results:
    Pos. 56°06'  Dist. 21".055  Ep. 1821.97
and Σ., who first made it a triple object, thus registered it:
    AB Pos. 269°.92  Dist.  0".692  Ep. 1830.38
AC 63°.02 22".407 1830.92
[AB WDS 351° 0".80 2019
AC 67° 22".40 2014 ]
Now the first two epochs exhibited so great an orbital change, in less than forty years, as to excite much attention; but the accordance of those of Σ. and myself, indicate some error of observation or entry. In this conclusion, however, Σ's angle for 1821.95, in the Dorpat Observations, is rejected; since it must be deemed rather an essay than a conclusive measurement.

[A quick check of the Gaia and Hipparcos data on SIMBAD shows C to be a background star while AB does appear to be a binary pair]
― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844
Other Data Sources for 7 Tauri
Nearby objects for 7 Tauri
5 objects found within 120'
11 Tauri 66 Arietis 9 Tauri
IC 1941 IC 336
Credits...

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

A complete list of credits and sources can be found on the about page

7 Tauri