21145+1000 STT 535AB (Del Equ)

 
 
21h 14m 28.81s +10 00' 25.1" P.A. 200 sep 0.31 mag 5.19,5.52 Sp F6V+F6V dist. 18.49 pc (60.31 l.y.)
 
 
Coord 2000
21145+1000
Discov num
STT 535
Comp
AB
Coord arcsec 2000
21 14 28.81 +10 00 25.1
Date first
1852
Date last
2018
Obs
508
Pa first
15
Pa last
201
P.A. Now (θ)
200°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.31"
Mag pri
5.19
Mag sec
5.52
delta mag (ΔM)
0.33
Spectral class
F6V+F6V (yellow-white/yellow-white)
Pri motion ra
+040
Sec motion ra
Pri motion dec
-304
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
21145+1000 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Del Equ 126643 21145+1000 STT 535 AB 1852 2018 508 200 0.3 5.19 5.52 0.33 Y <===
Show 21145+1000 STF2777 AB,C 1781 2016 91 6 76.5 4.54 10.17 5.63
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
200.9
Precise sep
0.321
Name
Del Equ
Constellation
Equuleus
SAO
126643
HIP
104858
Tycho2
1109-02583-1
Gaia DR2
62876699776
HD
202275
HR
8123
GC
29697
ADS
14773
GL
Gl 822A
BD
BD+09 4746
Bayer
Delta Equulei
Bayer name
Del Equ
Flamsteed
7 Equulei
Flamsteed name
7 Equ
Distance
18.49
Distance ly
60.31
last precise pa
200.9
last precise sep
0.321
 
 
ORBITAL ELEMENTS
 
 
Period (P)2084.03d (5.71y)± 0.1 Periastron (T)53112.071m (2004.293y)± 0.052 Semi-major axis (a)231.965m± 0.008
Eccentricity (e)0.436851± 0.000025 Inclination (i)99.4083°± 0.0098 Longitude of periastron (ω)7.735°± 0.013
Node (Ω)23.362°± 0.012 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2007
label rho theta
2000-01-01 0.215 210.6
2001-01-01 0.327 204.1
2002-01-01 0.298 199.3
2003-01-01 0.140 188.4
2004-01-01 0.111 31.4
2005-01-01 0.050 241.5
2006-01-01 0.264 208.0
2007-01-01 0.332 202.8
2008-01-01 0.265 197.5
2009-01-01 0.074 174.3
2010-01-01 0.129 22.1
2011-01-01 0.125 218.0
2012-01-01 0.299 206.2
2013-01-01 0.326 201.4
2014-01-01 0.220 195.0
2015-01-01 0.034 90.8
2016-01-01 0.083 9.4
2017-01-01 0.192 212.0
2018-01-01 0.321 204.7
2019-01-01 0.308 200.0
2020-01-01 0.165 191.0
2021-01-01 0.090 37.3
2022-01-01 0.030 284.9
2023-01-01 0.246 208.9
2024-01-01 0.331 203.3
2025-01-01 0.279 198.3
2026-01-01 0.101 182.2
2027-01-01 0.130 25.5
2028-01-01 0.095 222.9
2029-01-01 0.286 206.9
2030-01-01 0.330 202.0

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






wds21145%2B1000a.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
21145+1000 STT 535 AB 2007 501 21 0.3 5.19 5.52 F6V+F6V NOD 211428.81+100025.1
21145+1000 STT 535 AB 2008 506 6 0.1 5.19 5.52 F6V+F6V NOD 211428.81+100025.1
21145+1000 STT 535 AB 2013 523 18 0.3 5.19 5.52 F6V F6V NOD 211428.81+100025.1
21145+1000 STT 535 AB 2014 502 152 0.0 5.19 5.52 F6V+F6V NOD 211428.81+100025.1
21145+1000 STT 535 AB 2017 506 206 0.3 5.19 5.52 F6V+F6V NO 211428.81+100025.1

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