Coord 2000 | 12272+2701 | Discov num | STF1643 | Comp | AB | Coord arcsec 2000 | 12 27 13.72 +27 01 29.6 | ||||
Date first | 1830 | Date last | 2020 | Obs | 253 | ||||||
Pa first | 71 | Pa last | 3.1 | P.A. Now (θ) | 3.1° | ||||||
Sep first | 2.0 | Sep last | 2.76 | Sep. Now (ρ) | 2.76" | ||||||
Mag pri | 9.03 | Mag sec | 9.45 | delta mag (ΔM) | 0.42 | Spectral class | K2 (yellow-orange) | ||||
Pri motion ra | +094 | Sec motion ra | +084 | ||||||||
Pri motion dec | -248 | Sec motion dec | -242 | ||||||||
Notes | N O V (See Notes, Orbital solution, Proper motion indicates physical) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | HD 108421 | 82315 | 12 27 14 +27 01 30 | STF 1643 AB | 2020 | 253 | 3 | 2.8 | 9.03 | 9.45 | 0.42 | Y | <=== |
Show | 82315 | 12 27 14 +27 01 30 | LEP 54 AC | 2015 | 4 | 261 | 221.4 | 9.03 | 14.78 | 5.75 |
Name | HD 108421 | Constellation | Coma Berenices | SAO | 82315 | HIP | 60759 | ||||
Tycho2 | 1991-00865-1 | Gaia DR2 | 4008897567571892480 | HD | 108421 | GC | 16971 | ||||
ADS | 8553 | GL | NN 3725A | BD | BD+27 2135 | Distance | 27.21 | ||||
Distance ly | 88.76 |
Period (P) | 549.41y | Periastron (T) | 2193.49y | Semi-major axis (a) | 2.695a | |||
Eccentricity (e) | 0.58 | Inclination (i) | 115.2° | Longitude of periastron (ω) | 286.1° | |||
Node (Ω) | 155.3° | Notes | n | Reference | Ole2003b | |||
Equinox | 2000 | Last observation | 2000 | 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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