16578+1317 HDS 2399
16h 57m 46.09s +13° 17' 29.2" P.A. 237.00 sep 0.2 mag 10.90,13.09 Sp M0 dist. 40.8 pc (133.09 l.y.)
Coord 2000 |
16578+1317 |
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Discov num |
HDS2399 |
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Comp |
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Coord arcsec 2000 |
16 57 46.09 +13 17 29.2 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
12 |
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Pa first |
290 |
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Pa last |
237.1 |
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P.A. Now (θ) |
237.1° |
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Sep first |
0.6 |
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Sep last |
0.211 |
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Sep. Now (ρ) |
0.211" |
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Mag pri |
10.90 |
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Mag sec |
13.09 |
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delta mag (ΔM) |
2.19 |
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Spectral class |
M0 (red) |
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Pri motion ra |
+047 |
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Sec motion ra |
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Pri motion dec |
+072 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Hercules |
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HIP |
83010 |
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Tycho2 |
0987-00811-1 |
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Gaia DR2 |
4449182460449707904 |
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GL |
Gl 647 |
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Distance |
40.8 |
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Distance ly |
133.09 |
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ORBITAL ELEMENTS
Period (P) | 45.379y | |
Periastron (T) | 2018.8y | |
Semi-major axis (a) | 0.384a | |
Eccentricity (e) | 0.83 | |
Inclination (i) | 29.6° | |
Longitude of periastron (ω) | 100.7° | |
Node (Ω) | 14.1° | |
Notes | n | |
Reference | Tok2018e | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
302.2 |
0.606 |
2001 |
303.8 |
0.600 |
2002 |
305.4 |
0.593 |
2003 |
307.0 |
0.584 |
2004 |
308.7 |
0.573 |
2005 |
310.5 |
0.560 |
2006 |
312.4 |
0.545 |
2007 |
314.3 |
0.529 |
2008 |
316.4 |
0.510 |
2009 |
318.7 |
0.489 |
2010 |
321.2 |
0.465 |
2011 |
324.0 |
0.439 |
2012 |
327.1 |
0.409 |
2013 |
330.8 |
0.376 |
2014 |
335.3 |
0.338 |
2015 |
340.9 |
0.295 |
2016 |
348.8 |
0.245 |
2017 |
1.2 |
0.184 |
2018 |
29.2 |
0.108 |
2019 |
148.2 |
0.064 |
2020 |
212.7 |
0.138 |
2021 |
232.8 |
0.201 |
2022 |
243.9 |
0.253 |
2023 |
251.5 |
0.297 |
2024 |
257.1 |
0.337 |
2025 |
261.6 |
0.372 |
2026 |
265.4 |
0.403 |
2027 |
268.7 |
0.431 |
2028 |
271.6 |
0.457 |
2029 |
274.1 |
0.480 |
2030 |
276.5 |
0.501 |
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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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