HD 20947
DSS image of HD 20947
Overlaid DSS image of HD 20947, 60' x 60' with north at top and west to the right

Aladin viewer for the region around HD 20947
Σ 381, BD+20 554, WDS J03233+2058AB, SAO 75906, GSC 01245-00245

Type  
Magnitude  7.22
Right Ascension  3h 23' 19.3"  (2000)
Declination  20° 58' 14" N
Constellation  Aries
Description  Binary 7.22/8.71 1.1" 109°
Classification  G5
Observing Notes

Captain William Henry Smyth
Mar 11, 1834    No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827

A close double star, just following the tail of Aries, at about one-third of the distance between δ Arietis and the Pleiades. A 8, pearl white; B 9, yellow. This exquisitely delicate object is in a line with two distant stars of the 10th magnitude in the sp quadrant, and there is another small one in the nf: it is Σ.'s No. 381, "oblongam suspicor," and was thus first measured by its discoverer:
    Pos. 93°7  Dist. 0".75  Ep. 1827.16
[WDS 109° 1".10 2018 ]
The elongation is not immediately detected; and the focus was slightly distorted to examine the outline of the spurious disc. This, if well managed, is often of great use on such occasions. This star forms an angle of 28° from τ2 Arietis, 45 P. Hora III., with a distance of 16'; but though so distant from each other, it is singular that there appears to be a slight movement in space, partaken by both, in quantities of similar amount and denomination.
― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844
Other Data Sources for HD 20947
Nearby objects for HD 20947
4 objects found within 120'
65 Arietis 66 Arietis
Tau2 Arietis
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

HD 20947