| discov_num | notes | refcode |
| STF 728 | 32 Ori. The motion is still practically rectilinear, as represented | B__1956b |
| in formulae by van den Bos (1956) and Cester (1964). | Ces1964a | |
| Uniform disk diameter 0.196 +/- 0.015 mas, | ||
| Limb darkened diameter 0.200 +/- 0.015 mas, | ||
| Teff = 15700 +/- 500 K based on SED. | ||
| Radius is 2.33 +/- 0.25 \rsun. | CIA2019a | |
| H 1 25. | MEv2010 | |
| Probably optical. | B__1962d |
| refcode | metd | author | reference |
| B__1956b | orb - | van den Bos, W.H. | 1956CiUO..115..279V |
| B__1956b | Union Obs. Johannesburg Circ. 115, 279-284, 1956 | ||
| B__1962d | Ma j | van den Bos, W.H. | 1962AJ.....67..555V |
| B__1962d | AJ 67, 555, 1962 | ||
| Ces1964a | orb - | Cester, B. | 1962MmSAI..35..337C |
| Ces1964a | Mem. Soc. Astron. Ital. 35, 337, 1964 | ||
| CIA2019a | not j | Gordon, K.D., Gies, D.R., Schaefer, G.H., Huber, D. & Ireland, M. | 2019ApJ...873...91G |
| CIA2019a | ApJ 869, 37, 2018 | ||
| MEv2010 | - | MacEvoy, B. | ................... |
| MEv2010 | private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) | ||
| USN1999b | orb - | Seymour, D. & Hartkopf, W. | 1999IAUDS.139Q...2S |
| USN1999b | Inf. Circ. 139, 2, 1999 |
| idgroup | discov | author |
| 1 | STF | Struve, F.G.W. |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 05308+0557 | STF 728 | 2007 | 220 | 46 | 1.2 | 4.44 | 5.75 | B5V | NOD | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2008 | 223 | 46 | 1.2 | 4.44 | 5.75 | B5V | NOD | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2011 | 225 | 45 | 1.2 | 4.44 | 5.75 | B5V | NOD | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2012 | 231 | 45 | 1.2 | 4.44 | 5.75 | B5V | NOD | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2013 | 228 | 45 | 1.3 | 4.44 | 5.75 | B5V | NOD | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2015 | 230 | 43 | 1.2 | 4.44 | 5.75 | B5V | NO | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2017 | 232 | 43 | 1.3 | 4.44 | 5.75 | B5V | NO | 053047.06+055653.3 | |
| 05308+0557 | STF 728 | 2021 | 236 | 44 | 1.3 | 4.44 | 5.75 | B5V | NO | 053047.06+055653.3 |