00572+2325 MKT 2 Aa,Ab

 
 
00h 57m 12.43s +23 25' 03.9" P.A. 41.00 sep 0.0 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 40.5 P.A. Now (θ) 40.5°
Sep first 0.0 Sep last 0.01 Sep. Now (ρ) 0.01"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 74388 00 57 12 +23 25 04 MKT 2 Aa,Ab 1992 23 41 0.0 4.42 Y <===
Show Eta And 74388 00 57 12 +23 25 04 FOX 116 AB 2001 8 232 129.3 4.42 12.34 7.92
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Andromeda SAO 74388 HIP 4463 Tycho2 1740-02109-1
Gaia DR2 2803727059958899584 HD 5516 HR 271 GC 1136
BD BD+22 153 Bayer Eta Andromedae Bayer name Eta And Flamsteed 38 Andromedae
Flamsteed name 38 And FK5 2060 Distance 70.42 Distance ly 229.71
Bayer greek η And
 
 
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 Notesn ReferenceMkT1993b
Equinox Last observation1992 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 106.6 0.010
2001-01-01 167.6 0.009
2002-01-01 226.0 0.010
2003-01-01 276.0 0.010
2004-01-01 335.9 0.009
2005-01-01 36.7 0.010
2006-01-01 86.0 0.010
2007-01-01 141.9 0.009
2008-01-01 204.4 0.010
2009-01-01 255.8 0.010
2010-01-01 310.2 0.009
2011-01-01 14.2 0.009
2012-01-01 66.7 0.010
2013-01-01 117.7 0.010
2014-01-01 180.4 0.009
2015-01-01 236.1 0.010
2016-01-01 286.8 0.010
2017-01-01 349.1 0.009
2018-01-01 47.1 0.010
2019-01-01 96.1 0.010
2020-01-01 154.7 0.009
2021-01-01 215.5 0.010
2022-01-01 265.8 0.010
2023-01-01 322.9 0.009
2024-01-01 25.8 0.010
2025-01-01 76.4 0.010
2026-01-01 129.5 0.009
2027-01-01 192.8 0.009
2028-01-01 246.0 0.010
2029-01-01 298.2 0.009
2030-01-01 1.9 0.009


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



 
 


wds00572%2B2325b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic