07201+2159 STF1066 (Wasat)

 
 
07h 20m 07.39s +21 58' 56.4" P.A. 229.00 sep 5.5 mag 3.55,8.18 Sp A9III+K3V dist. 18.54 pc (60.48 l.y.)
 
 
Coord 2000
07201+2159
Discov num
STF1066
Comp
Coord arcsec 2000
07 20 07.39 +21 58 56.4
Date first
1822
Date last
2018
Obs
273
Pa first
198
Pa last
229
P.A. Now (θ)
229°
Sep first
7.1
Sep last
5.5
Sep. Now (ρ)
5.5"
Mag pri
3.55
Mag sec
8.18
delta mag (ΔM)
4.63
Spectral class
A9III+K3V (white/yellow-orange)
Pri motion ra
-026
Sec motion ra
Pri motion dec
-012
Sec motion dec
Notes
N O (See Notes, Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
228.9
Precise sep
5.541
Common name
Wasat
Meaning
the center of the sky
Other names
Wesat
Constellation
Gemini
SAO
79294
HIP
35550
Gaia DR2
1953646464
HD
56986
HR
2777
GC
9755
ADS
5983
GL
Gl 271A
BD
BD+22 1645
Bayer
Delta Geminorum
Bayer name
Del Gem
Flamsteed
55 Geminorum
Flamsteed name
55 Gem
Distance
18.54
Distance ly
60.48
last precise pa
228.9
last precise sep
5.541
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)2238.6001d (6.13y) Periastron (T)15466.5d (1901.222y) Semi-major axis (a)14.31m± 16.41
Eccentricity (e)0.353 Inclination (i)92.4°± 3.89 Longitude of periastron (ω)214.6°
Node (Ω)70.04°± 9.45 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation1991
label rho theta
2000-01-01 0.005 75.6
2001-01-01 0.016 70.5
2002-01-01 0.018 69.0
2003-01-01 0.011 66.7
2004-01-01 0.001 296.2
2005-01-01 0.010 250.7
2006-01-01 0.002 81.0
2007-01-01 0.016 70.7
2008-01-01 0.018 69.2
2009-01-01 0.012 67.1
2010-01-01 0.001 36.1
2011-01-01 0.009 251.4
2012-01-01 169.9
2013-01-01 0.015 71.0
2014-01-01 0.018 69.4
2015-01-01 0.013 67.5
2016-01-01 0.003 55.3
2017-01-01 0.009 252.1
2018-01-01 0.003 240.9
2019-01-01 0.013 71.3
2020-01-01 0.018 69.5
2021-01-01 0.014 67.8
2022-01-01 0.004 60.6
2023-01-01 0.008 253.0
2024-01-01 0.005 245.9
2025-01-01 0.012 71.7
2026-01-01 0.018 69.7
2027-01-01 0.015 68.1
2028-01-01 0.006 63.1
2029-01-01 0.006 254.3
2030-01-01 0.007 247.8

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






wds07201%2B2159r.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)1418.4375y± 625.7623 Periastron (T)2150.9833y± 47.4472 Semi-major axis (a)7.76117a± 2.62776
Eccentricity (e)0.70913± 0.24789 Inclination (i)51.036°± 13.893 Longitude of periastron (ω)268.361°± 11.904
Node (Ω)70.828°± 34.531 Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation2013
label rho theta
2000 5.827 224.9
2001 5.812 225.1
2002 5.796 225.3
2003 5.781 225.5
2004 5.765 225.7
2005 5.750 225.9
2006 5.734 226.1
2007 5.718 226.3
2008 5.702 226.5
2009 5.686 226.7
2010 5.669 227.0
2011 5.653 227.2
2012 5.637 227.4
2013 5.620 227.6
2014 5.603 227.8
2015 5.586 228.0
2016 5.569 228.2
2017 5.552 228.5
2018 5.535 228.7
2019 5.517 228.9
2020 5.499 229.1
2021 5.482 229.4
2022 5.464 229.6
2023 5.446 229.8
2024 5.427 230.0
2025 5.409 230.3
2026 5.391 230.5
2027 5.372 230.7
2028 5.353 231.0
2029 5.334 231.2
2030 5.315 231.4

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






wds07201%2B2159c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
07201+2159 STF1066 2006 230 225 5.4 3.55 8.18 A9III K3V NOD 072007.39+215856.4
07201+2159 STF1066 2009 232 226 5.6 3.55 8.18 A9III K3V NOD 072007.39+215856.4
07201+2159 STF1066 2012 240 228 5.6 3.55 8.18 A9III K3V NOD 072007.39+215856.4
07201+2159 STF1066 2013 254 230 5.6 3.55 8.18 A9III K3V NOD 072007.39+215856.4
07201+2159 STF1066 2015 258 228 5.7 3.55 8.18 A9III+K3V NO 072007.39+215856.4
07201+2159 STF1066 2016 267 230 5.5 3.55 8.18 A9III+K3V NO 072007.39+215856.4
07201+2159 STF1066 2017 268 234 5.4 3.55 8.18 A9III+K3V NO 072007.39+215856.4
07201+2159 STF1066 2018 273 229 5.5 3.55 8.18 A9III+K3V NO 072007.39+215856.4

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