21135+1559 HU  767

 
 
21h 13m 28.77s +15 58' 56.8" P.A. 22.6 sep 0.11 mag 7.05,7.13 Sp A5V dist. 87.64 pc (285.88 l.y.)
 
 
Coord 2000
21135+1559
Discov num
HU  767
Comp
Coord arcsec 2000
21 13 28.77 +15 58 56.8
Date first
1904
Date last
2014
Obs
179
Pa first
163
Pa last
183
P.A. Now (θ)
22.6°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.11"
Mag pri
7.05
Mag sec
7.13
delta mag (ΔM)
0.08
Spectral class
A5V (white)
Pri motion ra
+040
Sec motion ra
Pri motion dec
-034
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
182.9
Precise sep
0.109
Constellation
Pegasus
SAO
106930
HIP
104771
Tycho2
1650-01156-1
HD
202128
HR
8116
ADS
14761
BD
BD+15 4375
Distance
87.64
Distance ly
285.88
last precise pa
182.9
last precise sep
0.109
 
 
ORBITAL ELEMENTS
 
 
Period (P)34.33y± 0.12 Periastron (T)1978.083y± 0.092 Semi-major axis (a)0.1907a± 0.002
Eccentricity (e)0.586± 0.013 Inclination (i)66.66°± 0.61 Longitude of periastron (ω)120.1°± 0.5
Node (Ω)169.64°± 0.82 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.222 149.2
2001 0.226 151.7
2002 0.227 154.0
2003 0.226 156.4
2004 0.223 158.8
2005 0.216 161.4
2006 0.206 164.1
2007 0.190 167.2
2008 0.170 171.0
2009 0.142 176.1
2010 0.105 184.2
2011 0.059 203.6
2012 0.034 283.5
2013 0.072 335.9
2014 0.101 352.1
2015 0.111 2.8
2016 0.112 12.5
2017 0.108 22.6
2018 0.103 33.6
2019 0.099 45.7
2020 0.097 58.6
2021 0.098 71.6
2022 0.103 83.9
2023 0.110 94.7
2024 0.119 104.1
2025 0.130 112.0
2026 0.142 118.6
2027 0.154 124.2
2028 0.166 129.0
2029 0.177 133.1
2030 0.188 136.8

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

grafico orbita





wds21135%2B1559a.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
21135+1559 HU 767 2006 173 343 0.2 7.05 7.13 A5V NOD 211328.77+155856.8
21135+1559 HU 767 2008 178 171 0.2 7.05 7.13 A5V NOD 211328.77+155856.8
21135+1559 HU 767 2014 179 183 0.1 7.05 7.13 A5V NO 211328.77+155856.8

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