21423+0555 HU  280

 
 
21h 42m 18.45s +05 54' 43.0" P.A. 20.9 sep 0.16 mag 8.33,8.50 Sp A5 dist. 195.31 pc (637.1 l.y.)
 
 
Coord 2000
21423+0555
Discov num
HU  280
Comp
Coord arcsec 2000
21 42 18.45 +05 54 43.0
Date first
1900
Date last
2017
Obs
73
Pa first
318
Pa last
32
P.A. Now (θ)
20.9°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.16"
Mag pri
8.33
Mag sec
8.50
delta mag (ΔM)
0.17
Spectral class
A5 (white)
Pri motion ra
+013
Sec motion ra
Pri motion dec
+023
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
32
Precise sep
0.073
Constellation
Pegasus
HIP
107153
HD
206512
ADS
15236
Distance
195.31
Distance ly
637.1
last precise pa
32
last precise sep
0.073
 
 
ORBITAL ELEMENTS
 
 
Period (P)170.43y Periastron (T)1794.63y Semi-major axis (a)0.214a
Eccentricity (e)0.054 Inclination (i)46.3° Longitude of periastron (ω)315.3°
Node (Ω)315.1° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2000
label rho theta
2000 0.192 341.0
2001 0.190 342.9
2002 0.188 344.7
2003 0.187 346.6
2004 0.185 348.6
2005 0.183 350.5
2006 0.180 352.6
2007 0.178 354.6
2008 0.176 356.8
2009 0.174 358.9
2010 0.172 1.2
2011 0.170 3.4
2012 0.168 5.8
2013 0.166 8.2
2014 0.165 10.6
2015 0.163 13.1
2016 0.161 15.6
2017 0.160 18.2
2018 0.158 20.9
2019 0.157 23.5
2020 0.156 26.3
2021 0.155 29.0
2022 0.154 31.8
2023 0.154 34.6
2024 0.153 37.5
2025 0.153 40.3
2026 0.153 43.1
2027 0.153 46.0
2028 0.154 48.8
2029 0.154 51.6
2030 0.155 54.4

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

grafico orbita





wds21423%2B0555b.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
21423+0555 HU 280 2000 70 164 0.2 8.33 8.50 A5 NO 214218.45+055443.0
21423+0555 HU 280 2006 71 355 0.2 8.33 8.50 A5 NO 214218.45+055443.0
21423+0555 HU 280 2014 72 183 0.1 8.33 8.50 A5 NO 214218.45+055443.0
21423+0555 HU 280 2017 73 32 0.1 8.33 8.50 A5 NO 214218.45+055443.0

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