20289-1749 SHJ 323AB (Rho Cap)

 
 
20h 28m 51.62s -17 48' 49.2" P.A. 189.90 sep 1.7 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
2018
Obs
77
Pa first
177
Pa last
190
P.A. Now (θ)
189.9°
Sep first
4.0
Sep last
1.7
Sep. Now (ρ)
1.74"
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)
Visually invisible, K-band or other infrared star 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 2018 77 190 1.7 4.97 6.88 1.91 Y <===
Show 163614 20289-1749 BU 61 AC 1871 2015 11 149 53.5 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 2015 5 149 53.5 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
 
 
Precise pa
189.6
Precise sep
1.684
Name
Rho Cap
Constellation
Capricornus
SAO
163614
HIP
101027
Tycho2
6333-02128-1
Gaia DR2
74279114880
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
189.6
last precise sep
1.684
 
 
ORBITAL ELEMENTS
 
 
Period (P)375.9934y± 35.3768 Periastron (T)1963.1816y± 0.9798 Semi-major axis (a)2.49532a± 0.28841
Eccentricity (e)0.96563± 0.00996 Inclination (i)112.355°± 2.353 Longitude of periastron (ω)125.842°± 5.728
Node (Ω)150.379°± 2.937 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2013
label rho theta
2000 1.269 195.2
2001 1.295 194.9
2002 1.321 194.5
2003 1.346 194.2
2004 1.372 193.9
2005 1.397 193.6
2006 1.421 193.3
2007 1.446 193.0
2008 1.470 192.7
2009 1.494 192.4
2010 1.517 192.2
2011 1.541 191.9
2012 1.564 191.7
2013 1.587 191.4
2014 1.609 191.2
2015 1.632 191.0
2016 1.654 190.8
2017 1.676 190.6
2018 1.698 190.3
2019 1.719 190.1
2020 1.741 189.9
2021 1.762 189.8
2022 1.783 189.6
2023 1.804 189.4
2024 1.824 189.2
2025 1.845 189.0
2026 1.865 188.9
2027 1.885 188.7
2028 1.904 188.5
2029 1.924 188.4
2030 1.943 188.2

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






wds20289-1749c.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
20289-1749 SHJ 323 AB 2004 65 194 1.3 4.97 6.88 F3V NOD 202851.62-174849.2
20289-1749 SHJ 323 AB 2009 66 215 1.4 4.97 6.88 F3V NOD 202851.62-174849.2
20289-1749 SHJ 323 AB 2013 71 191 1.6 4.97 6.88 F3V NO 202851.62-174849.2
20289-1749 SHJ 323 AB 2016 71 194 1.5 4.97 6.88 F3V NO 202851.62-174849.2
20289-1749 SHJ 323 AB 2018 74 190 1.7 4.97 6.88 F3V NO 202851.62-174849.2

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