17141-0824 BAR 7 (HD 155802)
17h 14m 08.07s -08° 24' 13.8" P.A. 44.00 sep 1.5 mag 8.64,11.69 Sp K3V dist. 30.01 pc (97.89 l.y.)
Coord 2000 |
17141-0824 |
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Discov num |
BAR 7 |
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Comp |
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Coord arcsec 2000 |
17 14 08.07 -08 24 13.8 |
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Date first |
1891 |
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Date last |
2018 |
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Obs |
18 |
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Pa first |
154 |
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Pa last |
43.7 |
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P.A. Now (θ) |
43.7° |
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Sep first |
2.2 |
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Sep last |
1.495 |
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Sep. Now (ρ) |
1.495" |
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Mag pri |
8.64 |
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Mag sec |
11.69 |
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delta mag (ΔM) |
3.05 |
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Spectral class |
K3V (yellow-orange) |
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Pri motion ra |
-108 |
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Sec motion ra |
-102 |
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Pri motion dec |
+071 |
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Sec motion dec |
+070 |
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Notes |
O
(Orbital solution) |
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rPM=0.047 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 155802 |
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Constellation |
Ophiuchus |
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SAO |
141567 |
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HIP |
84303 |
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Tycho2 |
5645-00112-1 |
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Gaia DR2 |
4359814876901570688 |
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HD |
155802 |
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ADS |
10404 |
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BD |
BD-08 4400 |
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Distance |
30.01 |
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Distance ly |
97.89 |
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ORBITAL ELEMENTS
Period (P) | 390y | |
Periastron (T) | 2081.4y | |
Semi-major axis (a) | 1.878a | |
Eccentricity (e) | 0.204 | |
Inclination (i) | 140.4° | |
Longitude of periastron (ω) | 206.9° | |
Node (Ω) | 177.8° | |
Notes | | |
Reference | Tok2021f | |
Equinox | | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
64.6 |
1.478 |
2001 |
63.5 |
1.478 |
2002 |
62.4 |
1.477 |
2003 |
61.2 |
1.477 |
2004 |
60.1 |
1.478 |
2005 |
59.0 |
1.478 |
2006 |
57.9 |
1.478 |
2007 |
56.7 |
1.479 |
2008 |
55.6 |
1.480 |
2009 |
54.5 |
1.481 |
2010 |
53.4 |
1.482 |
2011 |
52.3 |
1.483 |
2012 |
51.1 |
1.484 |
2013 |
50.0 |
1.486 |
2014 |
48.9 |
1.487 |
2015 |
47.8 |
1.489 |
2016 |
46.7 |
1.490 |
2017 |
45.6 |
1.492 |
2018 |
44.5 |
1.494 |
2019 |
43.4 |
1.496 |
2020 |
42.3 |
1.498 |
2021 |
41.2 |
1.500 |
2022 |
40.1 |
1.502 |
2023 |
39.0 |
1.504 |
2024 |
37.9 |
1.506 |
2025 |
36.9 |
1.508 |
2026 |
35.8 |
1.510 |
2027 |
34.7 |
1.512 |
2028 |
33.6 |
1.514 |
2029 |
32.6 |
1.517 |
2030 |
31.5 |
1.519 |
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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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