HD 31764
DSS image of HD 31764
Overlaid DSS image of HD 31764, 60' x 60' with north at top and west to the right

Aladin viewer for the region around HD 31764
HR 1600, BD+14 796, WDS J04590+1433A, SAO 94240, GSC 00697-02146, HIP 23161

Type  Multiple Star
Magnitude  6.058
Right Ascension  4h 58' 59.4"  (2000)
Declination  14° 32' 36" N
Constellation  Orion
Description  Triple 6.0/7.4 39" 306° /9.6 54" 89°
Classification  B7V
Observing Notes

Andrew Cooper
Sep 27, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 6 Transparency: 7 Moon: 0%

A striking trio of stars found a degree northeast of ο2 Ori, a white 6.1 magnitude promary flanked by fainter companions, a 7.6 magnitude HD 31764 40" northwest and a 9.8 magnitude BD+14 797 54" east

This appears to be a physically bound trio with parallax of 2.85/2.35/2.44mas for the A/B/C components in the Gaia DR2 data, proper motions are also consistent. WDS also lists a 13th magnitude 90" companion D to the trio, this star does not appear to be associated with a parallax of 1.31mas

Captain William Henry Smyth
Dec 13, 1831    No. 6 The Crescent, Bedford, England (map)
150mm f/17.6 refractor by Tully 1827

A wide triple star, between the Bull's ear and Orion's arm; and nearly one-third of the distance from Aldebaran towards Betelgeuze, where it is also shewn by a line carried from Sirius through Bellatrix, and extended about 10° beyond.

A 7, white; B, which is No. 255 of Piazzi, 8, cerulean blue; and C 10, purple, with a minute star following it. This is a pretty though coarse object, forming a neat arc; and A and B were measured by H. and S. as 26 Bode Orionis, with results which may he thus placed with the conclusions obtained from the RAs and Decs. of the Palermitan Catalogue :
    P.        Pos. 301°00'  Dist. 44".30  Ep. 1800.00
H. and S. 304°25' 38".48 1822.09
[WDS 306° 39".30 2020 ]
A slight movement in space is attributed to A of the following value:
    P....  RA +0".05  Dec. -0".01
B.... -0".09 -0".03
[Gaia DR2 +0".005765 -0".007816]
― A Cycle of Celestial Objects Vol II, The Bedford Catalogue, William Henry Smyth, 1844
Other Data Sources for HD 31764
Associated objects for HD 31764
Nearby objects for HD 31764
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 31764