01554+0257 A 2407
01h 55m 22.03s +02° 57' 24.1" P.A. 338.00 sep 0.7 mag 10.05,10.50 Sp K0 dist. 45.17 pc (147.34 l.y.)
| Coord 2000 | 01554+0257 | Discov num | A 2407 | Comp | Coord arcsec 2000 | 01 55 22.03 +02 57 24.1 | |||||
| Date first | 1912 | Date last | 2019 | Obs | 27 | ||||||
| Pa first | 104 | Pa last | 337.7 | P.A. Now (θ) | 337.7° | ||||||
| Sep first | 0.5 | Sep last | 0.683 | Sep. Now (ρ) | 0.683" | ||||||
| Mag pri | 10.05 | Mag sec | 10.50 | delta mag (ΔM) | 0.45 | Spectral class | K0 (yellow-orange) | ||||
| Pri motion ra | -005 | Sec motion ra | -005 | ||||||||
| Pri motion dec | -047 | Sec motion dec | -047 | ||||||||
| Notes | N O (See Notes, Orbital solution) | ||||||||||
OTHER CATALOGS AND DESIGNATIONS
| Constellation | Pisces | HIP | 8958 | Tycho2 | 0033-00105-1 | Gaia DR2 | 2511741649734880896 | ||||
| ADS | 1530 | BD | BD+02 296 | Distance | 45.17 | Distance ly | 147.34 |
ORBITAL ELEMENTS
| Period (P) | 184.4y | ± 6.2 | Periastron (T) | 1976y | ± 2.4 | Semi-major axis (a) | 0.757a | ± 0.012 |
| Eccentricity (e) | 0.113 | ± 0.024 | Inclination (i) | 48° | ± 0.9 | Longitude of periastron (ω) | 49.3° | ± 6.9 |
| Node (Ω) | 181.2° | ± 2.3 | Notes | n | Reference | Tok2021c | ||
| Equinox | 2000 | Last observation | 2015 | Grade | 4 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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 Measures: green=micrometric, blue=interferometric, purple=photographic |
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