Coord 2000 | 00251+4803 |
Discov num | HDS 56 |
Comp | AB |
Coord arcsec 2000 | 00 25 08.74 +48 02 51.0 |
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Date first | 1991 |
Date last | 2013 |
Obs | 17 |
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Pa first | 242 |
Pa last | 273 |
P.A. Now (θ) | 231.5° |
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Sep first | 0.3 |
Sep last | 0.3 |
Sep. Now (ρ) | 0.26" |
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Mag pri | 7.72 |
Mag sec | 10.63 |
delta mag (ΔM) | 2.91 |
Spectral class | F8 (yellow-white) |
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Pri motion ra | +274 |
Sec motion ra | |||||||||
Pri motion dec | +011 |
Sec motion dec | |||||||||
Notes |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 36347 | 00 25 09 +48 02 51 | HDS 56 AB | 2013 | 17 | 232 | 0.3 | 7.72 | 10.63 | 2.91 | Y | <=== | |
Show | 36347 | 00 25 09 +48 02 51 | CRZ 2 AC | 2015 | 2 | 193 | 121.2 | 7.53 | 14.70 | 7.17 | |||
Show | 36347 | 00 25 09 +48 02 51 | SOZ 4 AB,D | 2015 | 2 | 259 | 13.8 | 6.38 | 12.50 | 6.12 | |||
Show | 36347 | 00 25 04 +47 59 19 | RED 14 Ca,Cb | 2005 | 1 | 233 | 0.3 | 16.23 | 16.40 | 0.17 |
Precise pa | 272.7 |
Precise sep | 0.325 |
Constellation | Hydra |
SAO | 36347 |
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HIP | 1987 |
Tycho2 | 3252-00597-1 |
Gaia DR2 | 392562179817077120 |
HD | 2057 |
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BD | BD+47 88 |
Distance | 43.82 |
Distance ly | 142.94 |
last precise pa | 272.7 |
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last precise sep | 0.325 |
Period (P) | 28.05y | ± 0.46 | Periastron (T) | 1999.29y | ± 0.55 | Semi-major axis (a) | 0.23a | ± 0.008 |
Eccentricity (e) | 0.481 | ± 0.058 | Inclination (i) | 164° | ± 3.8 | Longitude of periastron (ω) | 358.9° | ± 15.7 |
Node (Ω) | 96.1° | ± 16.2 | Note | Grade | 3 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation | 2007 |
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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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coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
00251+4803 | HDS 56 | AB | 2012 | 16 | 279 | 0.3 | 7.72 | 10.63 | F8 | NO | 002508.50+480250.9 |
00251+4803 | HDS 56 | AB | 2013 | 17 | 273 | 0.3 | 7.72 | 10.63 | F8 | NO | 002508.74+480251.0 |