| Coord 2000 | 21577-0038 |
Discov num | A 891 |
Comp | Coord arcsec 2000 | 21 57 41.19 -00 37 44.3 |
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| Date first | 1904 |
Date last | 2018 |
Obs | 25 |
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| Pa first | 57 |
Pa last | 78 |
P.A. Now (θ) | 78° |
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| Sep first | 0.4 |
Sep last | 0.7 |
Sep. Now (ρ) | 0.7" |
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| Mag pri | 9.50 |
Mag sec | 9.55 |
delta mag (ΔM) | 0.05 |
Spectral class | G0 (yellow) |
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| Pri motion ra | -059 |
Sec motion ra | -059 |
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| Pri motion dec | -060 |
Sec motion dec | -060 |
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| Notes | |||||||||||
| Precise pa | 77.7 |
Precise sep | 0.65 |
Constellation | Hydra |
SAO | 145771 |
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| Tycho2 | 5211-00561-1 |
HD | 208643 |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 21577-0038 | A 891 | 1995 | 24 | 73 | 0.6 | 9.50 | 9.55 | G0 | D | 215741.19-003744.3 | |
| 21577-0038 | A 891 | 2008 | 26 | 76 | 0.6 | 9.50 | 9.55 | G0 | D | 215741.19-003744.3 | |
| 21577-0038 | A 891 | 2018 | 24 | 78 | 0.7 | 9.50 | 9.55 | G0 | 215741.19-003744.3 |