23099-2227 RST3320 (89 Aqr)

 
 
23h 09m 54.88s -22 27' 27.3" P.A. 95.4 sep 0.25 mag 5.27,6.04 Sp G2IV+A2 dist. 154.56 pc (504.17 l.y.)
 
 
Coord 2000
23099-2227
Discov num
RST3320
Comp
Coord arcsec 2000
23 09 54.88 -22 27 27.3
Date first
1935
Date last
2013
Obs
46
Pa first
38
Pa last
113
P.A. Now (θ)
95.4°
Sep first
0.4
Sep last
0.2
Sep. Now (ρ)
0.25"
Mag pri
5.27
Mag sec
6.04
delta mag (ΔM)
0.77
Spectral class
G2IV+A2 (yellow/white)
Pri motion ra
+036
Sec motion ra
Pri motion dec
-014
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
112.8
Precise sep
0.212
Name
89 Aqr
Other name
c3 Aqr
Constellation
Aquarius
SAO
191687
HIP
114375
HD
218640
HR
8817
GC
32262
GL
Wo 9812A
Flamsteed
89 Aquarii
Flamsteed name
89 Aqr
Distance
154.56
Distance ly
504.17
last precise pa
112.8
last precise sep
0.212
 
 
ORBITAL ELEMENTS
 
 
Period (P)108.4y Periastron (T)2001.94y Semi-major axis (a)0.282a
Eccentricity (e)0.463 Inclination (i)162.4° Longitude of periastron (ω)314°
Node (Ω)156° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.148 220.5
2001 0.147 210.3
2002 0.148 200.0
2003 0.150 189.9
2004 0.153 180.2
2005 0.158 171.0
2006 0.163 162.3
2007 0.169 154.2
2008 0.176 146.7
2009 0.182 139.7
2010 0.190 133.3
2011 0.197 127.3
2012 0.204 121.7
2013 0.212 116.6
2014 0.219 111.7
2015 0.227 107.3
2016 0.234 103.1
2017 0.241 99.1
2018 0.249 95.4
2019 0.256 91.9
2020 0.263 88.6
2021 0.270 85.4
2022 0.277 82.4
2023 0.283 79.6
2024 0.290 76.9
2025 0.296 74.3
2026 0.302 71.8
2027 0.308 69.4
2028 0.314 67.1
2029 0.320 64.8
2030 0.325 62.7

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

grafico orbita





wds23099-2227a.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
23099-2227 RST3320 1991 40 286 0.2 5.27 6.04 G2IV+A2 NO 230954.88-222727.3
23099-2227 RST3320 2008 43 143 0.2 5.27 6.04 G2IV+A2 NO 230954.88-222727.3
23099-2227 RST3320 2009 45 135 0.2 5.27 6.04 G2IV+A2 NOD 230954.88-222727.3
23099-2227 RST3320 2013 46 113 0.2 5.27 6.04 G2IV A2 NO 230954.88-222727.3

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