20289-1749 SHJ 323AB (Rho Cap)

 
 
20H 28M 51.62S -17 48' 49.2" P.A. 188.3 SEP 1.81 MAG 4.97,6.88 SP F3V DIST. 30.27 PC (98.74 L.Y.)
 
 
Coord 2000
20289-1749
Discov num
SHJ 323
Comp
AB
Coord arcsec 2000
20 28 51.62 -17 48 49.2
Date first
1823
Date last
2016
Obs
71
Pa first
177
Pa last
194
P.A. Now (θ)
188.3°
Sep first
4.0
Sep last
1.5
Sep. Now (ρ)
1.81"
Mag pri
4.97
Mag sec
6.88
delta mag (ΔM)
1.91
Spectral class
F3V (yellow-white)
Pri motion ra
-003
Sec motion ra
-003
Pri motion dec
-017
Sec motion dec
-017
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
20289-1749 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Rho Cap 163614 20289-1749 SHJ 323 AB 1823 2016 71 188 1.8 4.97 6.88 1.91 Y <===
Show 163614 20289-1749 BU 61 AC 1871 2008 10 150 54.6 4.97 13.30 8.33
Show 163614 20289-1749 SHJ 323 AD 1800 2011 28 150 258.7 4.97 6.68 1.71
Show 163614 20289-1749 BU 61 BC 1898 1998 4 150 54.6 6.88 12.50 5.62
Show 163617 20289-1749 DOB 13 DE 1913 1999 5 96 54.3 6.67 10.60 3.93
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Rho Cap
Constellation
Capricornus
SAO
163614
HIP
101027
Tycho2
6333-02128-1
HD
194943
HR
7822
GC
28481
ADS
13887
GL
Gl 791.1A
BD
BD-18 5689
Bayer
Rho Capricorni
Bayer name
Rho Cap
Flamsteed
11 Capricorni
Flamsteed name
11 Cap
Distance
30.27
Distance ly
98.74
last precise pa
193.7
last precise sep
1.54
 
 
ORBITAL ELEMENTS
 
 
Period (P)278y Periastron (T)1965y Semi-major axis (a)1.877a
Eccentricity (e)0.91 Inclination (i)113.3° Longitude of periastron (ω)144.5°
Node (Ω)162° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1985
label rho theta
2000 1.326 193.6
2001 1.357 193.1
2002 1.388 192.7
2003 1.419 192.4
2004 1.449 192.0
2005 1.478 191.7
2006 1.508 191.3
2007 1.536 191.0
2008 1.565 190.7
2009 1.593 190.4
2010 1.621 190.1
2011 1.648 189.8
2012 1.675 189.5
2013 1.702 189.3
2014 1.729 189.0
2015 1.755 188.8
2016 1.780 188.5
2017 1.806 188.3
2018 1.831 188.1
2019 1.855 187.9
2020 1.880 187.6
2021 1.904 187.4
2022 1.928 187.2
2023 1.951 187.0
2024 1.975 186.8
2025 1.998 186.6
2026 2.020 186.5
2027 2.043 186.3
2028 2.065 186.1
2029 2.086 185.9
2030 2.108 185.8

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic