00572+2325 MKT   2Aa,Ab

 
 
00H 57M 12.43S +23 25' 03.9" P.A. 41 MAG 4.42, SP G8IIIB DIST. 70.42 PC (229.71 L.Y.)
 
 
Coord 2000
00572+2325
Discov num
MKT   2
Comp
Aa,Ab
Coord arcsec 2000
00 57 12.43 +23 25 03.9
Date first
1990
Date last
1992
Obs
23
Pa first
157
Pa last
41
P.A. Now (θ)
41°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
Mag pri
4.42
Mag sec
delta mag (ΔM)
Spectral class
G8IIIb (yellow)
Pri motion ra
-044
Sec motion ra
Pri motion dec
-045
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
00572+2325 SYSTEM COMPONENTS
 
 
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
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Andromeda
SAO
74388
HIP
4463
Tycho2
1740-02109-1
HD
5516
HR
271
GC
1136
BD
BD+22 153
Bayer
Eta Andromedae
Bayer name
Eta And
Flamsteed
38 Andromedae
Flamsteed name
38 And
Distance
70.42
Distance ly
229.71
last precise pa
40.5
last precise sep
0.01
 
 
ORBITAL ELEMENTS
 
 
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 Grade1(1=Definitive, 9=Indet.)
Equinox Last observation1992
label rho theta
2000-01-01 0.010 106.6
2001-01-01 0.009 167.6
2002-01-01 0.010 226.0
2003-01-01 0.010 276.0
2004-01-01 0.009 335.9
2005-01-01 0.010 36.7
2006-01-01 0.010 86.0
2007-01-01 0.009 141.9
2008-01-01 0.010 204.4
2009-01-01 0.010 255.8
2010-01-01 0.009 310.2
2011-01-01 0.009 14.2
2012-01-01 0.010 66.7
2013-01-01 0.010 117.7
2014-01-01 0.009 180.4
2015-01-01 0.010 236.1
2016-01-01 0.010 286.8
2017-01-01 0.009 349.1
2018-01-01 0.010 47.1
2019-01-01 0.010 96.1
2020-01-01 0.009 154.7
2021-01-01 0.010 215.5
2022-01-01 0.010 265.8
2023-01-01 0.009 322.9
2024-01-01 0.010 25.8
2025-01-01 0.010 76.4
2026-01-01 0.009 129.5
2027-01-01 0.009 192.8
2028-01-01 0.010 246.0
2029-01-01 0.009 298.2
2030-01-01 0.009 1.9

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic