| Coord 2000 | 02415-1506 | Discov num | HDS 351 | Comp | Coord arcsec 2000 | 02 41 30.12 -15 06 01.9 | |||||
| Date first | 1991 | Date last | 2023 | Obs | 24 | ||||||
| Pa first | 5 | Pa last | 24.1 | P.A. Now (θ) | 24.1° (calc) | ||||||
| Sep first | 0.1 | Sep last | 0.113 | Sep. Now (ρ) | 0.177" (calc) | ||||||
| Mag pri | 7.77 | Mag sec | 8.65 | delta mag (ΔM) | 0.88 | Spectral class | F7V (yellow-white) | ||||
| Pri motion ra | +091 | Sec motion ra | |||||||||
| Pri motion dec | -066 | Sec motion dec | |||||||||
| Notes | O (Orbital solution) | ||||||||||
| Name | HD 16826 | Constellation | Cetus | SAO | 148549 | HIP | 12554 | ||||
| Tycho2 | 5863-00755-1 | Gaia DR2 | 5157838496488670080 | HD | 16826 | BD | BD-15 477 | ||||
| Distance | 78.62 | Distance ly | 256.46 |
| Period (P) | 42.7y | ± 6 | Periastron (T) | 1979.8y | ± 6.5 | Semi-major axis (a) | 0.241a | ± 0.025 |
| Eccentricity (e) | 0.374 | ± 0.041 | Inclination (i) | 88.8° | ± 0.4 | Longitude of periastron (ω) | 294.6° | ± 17 |
| Node (Ω) | 24.2° | ± 0.5 | Notes | Reference | Tok2024c | |||
| Equinox | Last observation | Grade | 3 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.  Measures: green=micrometric, blue=interferometric, purple=photographic |
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