Coord 2000 | 00572+2325 |
Discov num | MKT 2 |
Comp | Aa,Ab |
Coord arcsec 2000 | 00 57 12.43 +23 25 03.9 |
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Date first | 1990 |
Date last | 1992 |
Obs | 23 |
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Pa first | 157 |
Pa last | 41 |
P.A. Now (θ) | 41° |
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Sep first | 0.0 |
Sep last | 0.0 |
Sep. Now (ρ) | 0" |
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Mag pri | 4.42 |
Mag sec | delta mag (ΔM) | Spectral class | G8IIIb (yellow) |
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Pri motion ra | -044 |
Sec motion ra | |||||||||
Pri motion dec | -045 |
Sec motion dec | |||||||||
Notes |
Show | name | SAO | coord_2000 | discov# | comp | first | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 74388 | 00572+2325 | MKT 2 | Aa,Ab | 1990 | 1992 | 23 | 41 | 0.0 | 4.42 | Y | <=== | |||
Show | Eta And | 74388 | 00572+2325 | FOX 116 | AB | 1894 | 2001 | 8 | 232 | 129.3 | 4.42 | 12.34 | 7.92 |
Precise pa | 40.5 |
Precise sep | 0.01 |
Constellation | Andromeda |
SAO | 74388 |
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HIP | 4463 |
Tycho2 | 1740-02109-1 |
Gaia DR2 | 59958899584 |
HD | 5516 |
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HR | 271 |
GC | 1136 |
BD | BD+22 153 |
Bayer | Eta Andromedae |
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Bayer name | Eta And |
Flamsteed | 38 Andromedae |
Flamsteed name | 38 And |
Distance | 70.42 |
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Distance ly | 229.71 |
last precise pa | 40.5 |
last precise sep | 0.01 |
Period (P) | 115.72d | ± 0.01 | Periastron (T) | 48013d (1990.331y) | ± 1 | Semi-major axis (a) | 10.37m | ± 0.03 |
Eccentricity (e) | 0.006 | ± 0.002 | Inclination (i) | 30.5° | ± 0.4 | Longitude of periastron (ω) | 215° | ± 4 |
Node (Ω) | 69.4° | ± 0.5 | Note | Grade | 1 | (1=Definitive, 9=Indet.) | ||
Equinox | Last observation | 1992 |
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 |
00572+2325 | MKT 2 | Aa,Ab | 1992 | 23 | 41 | 0.0 | 4.42 | G8IIIb | NO | 005712.43+232503.9 |