17111+5640 MET 80 (HD 155902)
17h 11m 08.43s +56° 39' 33.7" sep 0.1 mag 5.76,6.26 Sp G5 dist. 28.51 pc (93 l.y.)
| Coord 2000 |
17111+5640 |
|
Discov num |
MET 80 |
|
Comp |
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|
Coord arcsec 2000 |
17 11 08.43 +56 39 33.7 |
|
| Date first |
2003 |
|
Date last |
2003 |
|
Obs |
1 |
|
| Pa first |
0 |
|
Pa last |
0.2 |
|
P.A. Now (θ) |
0.2° |
|
| Sep first |
0.1 |
|
Sep last |
0.062 |
|
Sep. Now (ρ) |
0.062" |
|
| Mag pri |
5.76 |
|
Mag sec |
6.26 |
|
delta mag (ΔM) |
0.5 |
|
Spectral class |
G5 (yellow) |
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| Pri motion ra |
-002 |
|
Sec motion ra |
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| Pri motion dec |
-069 |
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Sec motion dec |
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| Notes |
V
K
(Proper motion indicates physical, K-band or other infrared magnitudes) |
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Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 155902 |
|
Constellation |
Draco |
|
SAO |
30285 |
|
HIP |
84062 |
|
| Tycho2 |
3895-00154-1 |
|
Gaia DR2 |
1432617510160019200 |
|
HD |
155902 |
|
GC |
23224 |
|
| GL |
NN 3993 |
|
BD |
BD+56 1954 |
|
Distance |
28.51 |
|
Distance ly |
93 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 17111+5640 GJ 3993 |
| coord_arcsec_2000 | 171108.43+563933.7 |
| Period (P) | 730d | ± 33 |
Periastron (T) | 48459d (1991.552y) | ± 322 |
Semi-major axis (a) | 10.4m | ± 1.7 |
| Eccentricity (e) | 0.38 | ± 0.23 |
Inclination (i) | 55° | ± 10 |
Longitude of periastron (ω) | 51° | ± 76 |
| Node (Ω) | 29° | ± 100 |
Notes | | |
Reference | Gln2007 | |
| Equinox | | |
Last observation | 1991 | |
Grade | 9 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
206.0 |
0.011 |
| 2001-01-01 |
308.1 |
0.007 |
| 2002-01-01 |
206.1 |
0.011 |
| 2003-01-01 |
308.4 |
0.007 |
| 2004-01-01 |
206.2 |
0.011 |
| 2005-01-01 |
308.6 |
0.007 |
| 2006-01-01 |
206.3 |
0.011 |
| 2007-01-01 |
308.9 |
0.007 |
| 2008-01-01 |
206.4 |
0.011 |
| 2009-01-01 |
309.2 |
0.007 |
| 2010-01-01 |
206.5 |
0.011 |
| 2011-01-01 |
309.5 |
0.007 |
| 2012-01-01 |
206.6 |
0.011 |
| 2013-01-01 |
309.7 |
0.007 |
| 2014-01-01 |
206.7 |
0.011 |
| 2015-01-01 |
310.0 |
0.007 |
| 2016-01-01 |
206.8 |
0.011 |
| 2017-01-01 |
310.3 |
0.007 |
| 2018-01-01 |
207.0 |
0.011 |
| 2019-01-01 |
310.6 |
0.007 |
| 2020-01-01 |
207.1 |
0.011 |
| 2021-01-01 |
310.8 |
0.007 |
| 2022-01-01 |
207.2 |
0.011 |
| 2023-01-01 |
311.1 |
0.007 |
| 2024-01-01 |
207.3 |
0.011 |
| 2025-01-01 |
311.4 |
0.007 |
| 2026-01-01 |
207.4 |
0.011 |
| 2027-01-01 |
311.7 |
0.007 |
| 2028-01-01 |
207.5 |
0.011 |
| 2029-01-01 |
311.9 |
0.007 |
| 2030-01-01 |
207.6 |
0.011 |
|
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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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