Coord 2000 | 00284-2020 |
Discov num | B 1909 |
Comp | Coord arcsec 2000 | 00 28 21.17 -20 20 05.2 |
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Date first | 1929 |
Date last | 2015 |
Obs | 88 |
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Pa first | 119 |
Pa last | 137 |
P.A. Now (θ) | 248.7° |
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Sep first | 0.2 |
Sep last | 0.2 |
Sep. Now (ρ) | 0.09" |
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Mag pri | 7.23 |
Mag sec | 7.40 |
delta mag (ΔM) | 0.17 |
Spectral class | G0V (yellow) |
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Pri motion ra | -116 |
Sec motion ra | |||||||||
Pri motion dec | -114 |
Sec motion dec | |||||||||
Notes |
Constellation | Cetus |
SAO | 166296 |
HIP | 2237 |
Tycho2 | 5846-00959-1 |
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HD | 2475 |
HR | 108 |
BD | BD-21 57 |
Distance | 32.2 |
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Distance ly | 105.04 |
last precise pa | 137.2 |
last precise sep | 0.156 |
Period (P) | 11.35y | Periastron (T) | 1995.09y | Semi-major axis (a) | 0.202a | |||
Eccentricity (e) | 0.005 | Inclination (i) | 69.8° | Longitude of periastron (ω) | 99° | |||
Node (Ω) | 119.49° | Note | Grade | 1 | (1=Definitive, 9=Indet.) | |||
Equinox | 2000 | Last observation | 2009 |
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 |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
00284-2020 | B 1909 | 1999 | 71 | 156 | 0.1 | 7.23 | 7.40 | G0V | NOD | 002821.17-202005.2 | |
00284-2020 | B 1909 | 2008 | 77 | 297 | 0.2 | 7.23 | 7.40 | G0V | NOD | 002821.17-202005.2 | |
00284-2020 | B 1909 | 2010 | 80 | 337 | 0.1 | 7.23 | 7.40 | G0V | NOD | 002821.17-202005.2 | |
00284-2020 | B 1909 | 2014 | 83 | 301 | 0.2 | 7.23 | 7.40 | G0V | NO | 002821.17-202005.2 | |
00284-2020 | B 1909 | 2015 | 84 | 137 | 0.2 | 7.23 | 7.40 | G0V | NO | 002821.17-202005.2 |