21001+0731 KUI 102

 
 
21h 00m 03.95s +07 30' 58.2" P.A. 217.3 sep 0.19 mag 6.23,8.13 Sp F1Vp dist. 75.82 pc (247.32 l.y.)
 
 
Coord 2000
21001+0731
Discov num
KUI 102
Comp
Coord arcsec 2000
21 00 03.95 +07 30 58.2
Date first
1934
Date last
2015
Obs
78
Pa first
28
Pa last
244
P.A. Now (θ)
217.3°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.19"
Mag pri
6.23
Mag sec
8.13
delta mag (ΔM)
1.9
Spectral class
F1Vp (yellow-white)
Pri motion ra
+046
Sec motion ra
Pri motion dec
+021
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
243.7
Precise sep
0.17
Cdsa2 id
KUI 102
Constellation
Equuleus
SAO
126447
HIP
103652
HD
199942
HR
8038
Ra deg
21.00109722222222
De deg
7.516166666666667
Distance
75.82
Distance ly
247.32
last precise pa
243.7
last precise sep
0.17
 
 
ORBITAL ELEMENTS
 
 
Period (P)58.4y Periastron (T)1959.09y Semi-major axis (a)0.295a
Eccentricity (e)0.295 Inclination (i)130.8° Longitude of periastron (ω)318.1°
Node (Ω)192° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2006
label rho theta
2000 0.341 10.4
2001 0.333 7.4
2002 0.323 4.3
2003 0.311 1.0
2004 0.297 357.4
2005 0.282 353.4
2006 0.265 348.9
2007 0.247 343.8
2008 0.228 337.9
2009 0.209 330.8
2010 0.189 322.4
2011 0.172 312.1
2012 0.157 299.6
2013 0.148 285.2
2014 0.145 269.5
2015 0.150 254.0
2016 0.159 239.9
2017 0.173 227.7
2018 0.187 217.3
2019 0.200 208.3
2020 0.211 200.4
2021 0.220 193.2
2022 0.225 186.4
2023 0.228 179.9
2024 0.229 173.5
2025 0.227 167.1
2026 0.225 160.5
2027 0.221 153.8
2028 0.218 146.9
2029 0.215 139.7
2030 0.213 132.4

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

grafico orbita





wds21001%2B0731a.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
21001+0731 KUI 102 2001 76 7 0.3 6.23 8.13 F1Vp NOD 210003.95+073058.2
21001+0731 KUI 102 2006 77 346 0.3 6.23 8.13 F1Vp NOD 210003.95+073058.2
21001+0731 KUI 102 2015 78 244 0.2 6.23 8.13 F1Vp NO 210003.95+073058.2

If you need more information about this double, apply for a data request form to the WDS.