21221+1948 STFB 11 AB (1 Peg)

 
 
21h 22m 05.13s +19° 48' 15.7" P.A. 313.00 sep 36.6 mag 4.20,9.30 Sp K1III+K0V dist. 47.78 pc (155.86 l.y.)
 
 
Coord 2000 21221+1948 Discov num STFB 11 Comp AB Coord arcsec 2000 21 22 05.13 +19 48 15.7
Date first 1780 Date last 2020 Obs 85
Pa first 308 Pa last 312.8 P.A. Now (θ) 312.8°
Sep first 37.1 Sep last 36.64 Sep. Now (ρ) 36.64"
Mag pri 4.20 Mag sec 9.30 delta mag (ΔM) 5.1 Spectral class K1III+K0V (yellow-orange/yellow-orange)
Pri motion ra +105 Sec motion ra +119
Pri motion dec +063 Sec motion dec +056
Notes N O T (See Notes, Orbital solution, Parallax indicates physical)
rPM=0.119 (< 0.3, Physical double)
This double is physical.
 
 
21221+1948 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 1 Peg 107073 21 22 05 +19 48 16 STFB 11 AB 2020 85 313 36.6 4.20 9.30 5.10 Y <===
Show 107073 21 22 05 +19 48 16 STFB 11 AC 2017 8 13 64.3 4.20 12.90 8.70
Show 107073 21 22 05 +19 48 16 TOK 9001 AD 1993 3 151 5.3 4.20 9.60 5.40
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 1 Peg Constellation Pegasus SAO 107073 HIP 105502
Tycho2 1671-00986-1 Gaia DR2 1790202365372381056 HD 203504 HR 8173
GC 29914 ADS 14909 DM BD+19 4690 BD BD+19 4691
Flamsteed 1 Pegasi Flamsteed name 1 Peg FK5 804 Distance 47.78
Distance ly 155.86
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
 
 
SUSPECTED ORBITAL ELEMENTS SOLUTION #1
 
 
Identifier21221+1948
coord_arcsec_2000212205.13+194815.7
Period (P)13500y Periastron (T)7315y Semi-major axis (a)21.97a
Eccentricity (e)0.7 Inclination (i)18° Longitude of periastron (ω)351°
Node (Ω)131° Notesn ReferencePkO2014c
Equinox2000 Last observation2011 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 311.6 36.152
2001 311.6 36.150
2002 311.6 36.148
2003 311.7 36.147
2004 311.7 36.145
2005 311.7 36.143
2006 311.7 36.142
2007 311.7 36.140
2008 311.7 36.138
2009 311.7 36.137
2010 311.7 36.135
2011 311.7 36.133
2012 311.7 36.132
2013 311.7 36.130
2014 311.7 36.128
2015 311.7 36.126
2016 311.7 36.125
2017 311.7 36.123
2018 311.8 36.121
2019 311.8 36.120
2020 311.8 36.118
2021 311.8 36.116
2022 311.8 36.114
2023 311.8 36.113
2024 311.8 36.111
2025 311.8 36.109
2026 311.8 36.108
2027 311.8 36.106
2028 311.8 36.104
2029 311.8 36.102
2030 311.8 36.101


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



 
 


wds21221%2B1948a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
 
 
SUSPECTED ORBITAL ELEMENTS SOLUTION #2
 
 
Identifier21221+1948
coord_arcsec_2000212205.13+194815.7
Period (P)17500y Periastron (T)8212y Semi-major axis (a)26.06a
Eccentricity (e)0.7 Inclination (i)30° Longitude of periastron (ω)265°
Node (Ω)212° Notesn ReferencePkO2014c
Equinox2000 Last observation2011 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 311.7 36.190
2001 311.7 36.188
2002 311.7 36.187
2003 311.7 36.185
2004 311.8 36.183
2005 311.8 36.182
2006 311.8 36.180
2007 311.8 36.178
2008 311.8 36.177
2009 311.8 36.175
2010 311.8 36.173
2011 311.8 36.172
2012 311.8 36.170
2013 311.8 36.168
2014 311.8 36.167
2015 311.8 36.165
2016 311.8 36.163
2017 311.8 36.162
2018 311.8 36.160
2019 311.9 36.158
2020 311.9 36.156
2021 311.9 36.155
2022 311.9 36.153
2023 311.9 36.151
2024 311.9 36.150
2025 311.9 36.148
2026 311.9 36.146
2027 311.9 36.145
2028 311.9 36.143
2029 311.9 36.141
2030 311.9 36.139


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



 
 


wds21221%2B1948b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
 
 
SUSPECTED ORBITAL ELEMENTS SOLUTION #3
 
 
Identifier21221+1948
coord_arcsec_2000212205.13+194815.7
Period (P)17500y Periastron (T)9717y Semi-major axis (a)26.06a
Eccentricity (e)0.61 Inclination (i)38° Longitude of periastron (ω)47°
Node (Ω)85° Notesn ReferencePkO2014c
Equinox2000 Last observation2011 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 311.8 36.085
2001 311.8 36.083
2002 311.9 36.081
2003 311.9 36.080
2004 311.9 36.078
2005 311.9 36.076
2006 311.9 36.075
2007 311.9 36.073
2008 311.9 36.071
2009 311.9 36.069
2010 311.9 36.068
2011 311.9 36.066
2012 311.9 36.064
2013 311.9 36.063
2014 311.9 36.061
2015 311.9 36.059
2016 312.0 36.058
2017 312.0 36.056
2018 312.0 36.054
2019 312.0 36.053
2020 312.0 36.051
2021 312.0 36.049
2022 312.0 36.047
2023 312.0 36.046
2024 312.0 36.044
2025 312.0 36.042
2026 312.0 36.041
2027 312.0 36.039
2028 312.0 36.037
2029 312.0 36.036
2030 312.0 36.034


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



 
 


wds21221%2B1948c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic