22430+3013 BLA 11 Aa,Ab

 
 
22h 43m 00.13s +30° 13' 16.7" P.A. 28.00 sep 0.1 mag 4.10,6.90 Sp G2III dist. 65.7 pc (214.31 l.y.)
 
 
Coord 2000 22430+3013 Discov num BLA  11 Comp Aa,Ab Coord arcsec 2000 22 43 00.13 +30 13 16.7
Date first 1975 Date last 2005 Obs 66
Pa first 24 Pa last 27.8 P.A. Now (θ) 27.8°
Sep first 0.1 Sep last 0.051 Sep. Now (ρ) 0.051"
Mag pri 4.10 Mag sec 6.90 delta mag (ΔM) 2.8 Spectral class G2III (yellow)
Pri motion ra +013 Sec motion ra
Pri motion dec -026 Sec motion dec
Notes N O R (See Notes, Orbital solution, Red magnitudes)
This double is physical.
 
 
22430+3013 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 90734 22 43 00 +30 13 17 BLA 11 Aa,Ab 2005 66 28 0.1 4.10 6.90 2.80 Y <===
Show Matar 90734 22 43 00 +30 13 17 BU 1144 A,BC 2012 28 338 91.9 3.02 9.87 6.85
Show 90734 22 43 00 +30 13 17 FYM 145 AG 2015 4 272 119.1 3.02 13.50 10.48
Show 90734 22 43 00 +30 13 17 FYM 145 AH 2015 5 149 80.1 3.02 14.20 11.18
Show 90734 22 43 00 +30 13 17 FYM 145 AJ 2015 5 38 94.3 3.02 15.00 11.98
Show 22 42 57 +30 14 43 BU 1144 BC 2014 21 84 0.2 10.60 10.60 0.00
Show 22 42 57 +30 14 43 BU 1144 BC,D 2014 7 321 62.9 9.87 14.50 4.63
Show 22 42 57 +30 14 43 FYM 145 BF 2015 7 355 56.4 9.87 14.20 4.33
Show 22 42 54 +30 15 32 BU 1144 DE 2015 8 160 5.3 14.50 15.50 1.00
Show 22 43 03 +30 12 08 FYM 145 HI 2014 4 195 15.0 14.20 14.70 0.50
11-fold system
11 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Matar Var name NSV14285 Peg Constellation Pegasus SAO 90734
HIP 112158 Tycho2 2736-01823-1 Gaia DR2 1887953690724601984 HD 215182
HR 8650 GC 31706 ADS 16211 BD BD+29 4741
Bayer Eta Pegasi Bayer name Eta Peg Flamsteed 44 Pegasi Flamsteed name 44 Peg
FK5 857 Distance 65.7 Distance ly 214.31 Bayer greek η Peg
Meaning Mongolian proposal; a name given to the Gobi bear.
 
 
ORBITAL ELEMENTS
 
 
Period (P)817.41d (2.24y)± 0.04 Periastron (T)47140.3d (1987.942y)± 0.4 Semi-major axis (a)45.02m± 0.06
Eccentricity (e)0.1677± 0.0009 Inclination (i)68.28°± 0.05 Longitude of periastron (ω)354.5°± 0.1
Node (Ω)20.9°± 0.04 Notesn ReferenceMkT1998
Equinox2000 Last observation1997 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 186.3 0.043
2001-01-01 308.7 0.016
2002-01-01 160.7 0.025
2003-01-01 232.0 0.029
2004-01-01 77.2 0.018
2005-01-01 211.5 0.046
2006-01-01 32.6 0.034
2007-01-01 200.4 0.053
2008-01-01 11.3 0.035
2009-01-01 189.1 0.046
2010-01-01 328.0 0.018
2011-01-01 168.6 0.029
2012-01-01 240.1 0.025
2013-01-01 96.1 0.017
2014-01-01 214.4 0.043
2015-01-01 37.8 0.032
2016-01-01 202.4 0.052
2017-01-01 15.7 0.037
2018-01-01 191.7 0.048
2019-01-01 342.4 0.022
2020-01-01 174.6 0.033
2021-01-01 251.2 0.021
2022-01-01 117.1 0.017
2023-01-01 217.6 0.040
2024-01-01 44.2 0.028
2025-01-01 204.6 0.052
2026-01-01 19.9 0.037
2027-01-01 194.1 0.050
2028-01-01 352.7 0.025
2029-01-01 179.3 0.037
2030-01-01 266.9 0.018


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



 
 


wds22430%2B3013a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic