21074-0814 BU 368 AB (HD 201038)

 
 
21h 07m 26.28s -08° 14' 05.6" P.A. 312.00 sep 0.0 mag 7.56,8.24 Sp A0 dist. 117.65 pc (383.77 l.y.)
 
 
Coord 2000 21074-0814 Discov num BU  368 Comp AB Coord arcsec 2000 21 07 26.28 -08 14 05.6
Date first 1875 Date last 2021 Obs 78
Pa first 100 Pa last 311.8 P.A. Now (θ) 318.2°
Sep first 0.5 Sep last 0.05 Sep. Now (ρ) 0.039"
Mag pri 7.56 Mag sec 8.24 delta mag (ΔM) 0.68 Spectral class A0 (white)
Pri motion ra -019 Sec motion ra
Pri motion dec -007 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
21074-0814 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 201038 145118 21 07 26 -08 14 06 BU 368 AB 2021 78 312 0.0 7.56 8.24 0.68 Y <===
Show 145118 21 07 26 -08 14 06 BU 368 AC 2004 5 39 15.6 7.56 14.10 6.54
Show 145118 21 07 26 -08 14 06 POP 227 AB,E 2004 3 117 51.3 7.56 14.92 7.36
Show 21 07 27 -08 13 53 BU 368 CD 2015 9 298 6.0 14.10 14.80 0.70
Quintuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 201038 Constellation Aquarius SAO 145118 HIP 104272
Tycho2 5771-01610-1 Gaia DR2 6897081208037262592 HD 201038 GC 29515
ADS 14648 BD BD-08 5581 Distance 117.65 Distance ly 383.77
 
 
ORBITAL ELEMENTS
 
 
Period (P)345.28y± 15.75 Periastron (T)1954.64y± 1.11 Semi-major axis (a)0.576a± 0.013
Eccentricity (e)0.665± 0.02 Inclination (i)87.6°± 0.6 Longitude of periastron (ω)304.2°± 1.9
Node (Ω)270.1°± 0.5 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 277.6 0.167
2001 278.0 0.162
2002 278.4 0.156
2003 278.8 0.151
2004 279.3 0.145
2005 279.9 0.139
2006 280.5 0.133
2007 281.1 0.127
2008 281.8 0.122
2009 282.6 0.116
2010 283.4 0.110
2011 284.4 0.104
2012 285.4 0.098
2013 286.6 0.092
2014 288.0 0.087
2015 289.5 0.081
2016 291.3 0.075
2017 293.4 0.069
2018 295.8 0.064
2019 298.7 0.058
2020 302.2 0.053
2021 306.5 0.048
2022 311.7 0.043
2023 318.2 0.039
2024 326.1 0.035
2025 335.7 0.032
2026 346.7 0.030
2027 358.7 0.030
2028 10.6 0.031
2029 21.5 0.033
2030 30.9 0.036


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



 
 


wds21074-0814d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic