11250-3200 CHR 242 Aa,Ab
11h 24m 58.83s -31° 59' 57.5" P.A. 72.00 sep 0.1 mag 8.00,8.90 Sp G5V dist. 47.35 pc (154.46 l.y.)
Coord 2000 |
11250-3200 |
|
Discov num |
CHR 242 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
11 24 58.83 -31 59 57.5 |
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Date first |
1996 |
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Date last |
2021 |
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Obs |
12 |
|
Pa first |
340 |
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Pa last |
71.9 |
|
P.A. Now (θ) |
345.9° |
|
Sep first |
0.1 |
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Sep last |
0.096 |
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Sep. Now (ρ) |
0.058" |
|
Mag pri |
8.00 |
|
Mag sec |
8.90 |
|
delta mag (ΔM) |
0.9 |
|
Spectral class |
G5V (yellow) |
|
Pri motion ra |
-060 |
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Sec motion ra |
|
|
Pri motion dec |
+013 |
|
Sec motion dec |
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|
Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
11250-3200 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
202425 |
11 24 59 -31 59 58 |
CHR 242 Aa,Ab |
2021 |
12 |
72 |
0.1 |
8.00 |
8.90 |
0.90 |
Y |
<=== |
Show |
HD 99240 |
202425 |
11 24 59 -31 59 58 |
UC 2133 AB |
2017 |
10 |
192 |
57.1 |
8.93 |
9.92 |
0.99 |
|
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Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Hydra |
|
SAO |
202425 |
|
HIP |
55714 |
|
Tycho2 |
7219-00022-1 |
|
Gaia DR2 |
3481380127975181696 |
|
HD |
99240 |
|
CD |
CD-31 8979 |
|
CP |
CP-31 3271 |
|
Distance |
47.35 |
|
Distance ly |
154.46 |
|
ORBITAL ELEMENTS
Period (P) | 13.47y | ± 0.13 |
Periastron (T) | 2010.74y | ± 0.14 |
Semi-major axis (a) | 0.137a | ± 0.002 |
Eccentricity (e) | 0.563 | ± 0.02 |
Inclination (i) | 115.7° | ± 1 |
Longitude of periastron (ω) | 211° | ± 4.7 |
Node (Ω) | 123.7° | ± 1.7 |
Notes | n | |
Reference | Tok2019c | |
Equinox | | |
Last observation | 2018 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
129.7 |
0.152 |
2001 |
123.4 |
0.182 |
2002 |
118.4 |
0.197 |
2003 |
113.9 |
0.198 |
2004 |
109.1 |
0.190 |
2005 |
103.6 |
0.172 |
2006 |
96.5 |
0.145 |
2007 |
85.5 |
0.112 |
2008 |
64.4 |
0.076 |
2009 |
17.4 |
0.054 |
2010 |
323.3 |
0.065 |
2011 |
266.6 |
0.039 |
2012 |
152.3 |
0.072 |
2013 |
133.9 |
0.132 |
2014 |
126.1 |
0.170 |
2015 |
120.7 |
0.191 |
2016 |
116.0 |
0.199 |
2017 |
111.4 |
0.195 |
2018 |
106.4 |
0.181 |
2019 |
100.1 |
0.159 |
2020 |
91.4 |
0.128 |
2021 |
76.4 |
0.093 |
2022 |
43.6 |
0.061 |
2023 |
345.9 |
0.058 |
2024 |
300.6 |
0.061 |
2025 |
182.6 |
0.040 |
2026 |
139.9 |
0.106 |
2027 |
129.3 |
0.155 |
2028 |
123.1 |
0.183 |
2029 |
118.1 |
0.197 |
2030 |
113.6 |
0.198 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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