15416+1940 HU 580 AB
15h 41m 33.09s +19° 40' 13.8" P.A. 249.00 sep 0.2 mag 5.35,5.22 Sp B9V+A1V dist. 58.28 pc (190.11 l.y.)
| Coord 2000 |
15416+1940 |
|
Discov num |
HU 580 |
|
Comp |
AB |
|
Coord arcsec 2000 |
15 41 33.09 +19 40 13.8 |
|
| Date first |
1902 |
|
Date last |
2012 |
|
Obs |
245 |
|
| Pa first |
72 |
|
Pa last |
249.4 |
|
P.A. Now (θ) |
65.9° |
|
| Sep first |
0.2 |
|
Sep last |
0.218 |
|
Sep. Now (ρ) |
0.186" |
|
| Mag pri |
5.35 |
|
Mag sec |
5.22 |
|
delta mag (ΔM) |
0.13 |
|
Spectral class |
B9V+A1V (blue-white/white) |
|
| Pri motion ra |
-056 |
|
Sec motion ra |
|
|
| Pri motion dec |
-044 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
15416+1940 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
101682 |
15 41 33 +19 40 14 |
HU 580 AB |
2012 |
245 |
249 |
0.2 |
5.35 |
5.22 |
0.13 |
Y |
<=== |
| Show |
Iot Ser |
101682 |
15 41 33 +19 40 14 |
BU 1451 AB,C |
2014 |
5 |
353 |
144.9 |
4.51 |
13.40 |
8.89 |
|
|
| Show |
|
101682 |
15 41 33 +19 40 14 |
BU 1451 AB,D |
2020 |
7 |
109 |
152.8 |
4.51 |
12.60 |
8.09 |
|
|
Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Serpens |
|
SAO |
101682 |
|
HIP |
76852 |
|
Tycho2 |
1498-01787-1 |
|
| Gaia DR2 |
1210043543151367680 |
|
HD |
140159 |
|
HR |
5842 |
|
GC |
21102 |
|
| ADS |
9744 |
|
BD |
BD+20 3138 |
|
Bayer |
Iota Serpentis |
|
Bayer name |
Iot Ser |
|
| Flamsteed |
21 Serpentis |
|
Flamsteed name |
21 Ser |
|
Distance |
58.28 |
|
Distance ly |
190.11 |
|
| Bayer greek |
ι Ser |
|
ORBITAL ELEMENTS
| Period (P) | 8015d (21.94y) | ± 6.3 |
Periastron (T) | 54180m (2007.217y) | ± 33 |
Semi-major axis (a) | 0.21033a | ± 0.00047 |
| Eccentricity (e) | 0.0941 | ± 0.0028 |
Inclination (i) | 83.608° | ± 0.043 |
Longitude of periastron (ω) | 80.5° | ± 1.8 |
| Node (Ω) | 69.684° | ± 0.033 |
Notes | n | |
Reference | Mut2010b | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
62.9 |
0.152 |
| 2001 |
65.7 |
0.184 |
| 2002 |
67.9 |
0.203 |
| 2003 |
69.8 |
0.205 |
| 2004 |
71.8 |
0.189 |
| 2005 |
74.5 |
0.156 |
| 2006 |
79.2 |
0.108 |
| 2007 |
94.0 |
0.050 |
| 2008 |
203.3 |
0.029 |
| 2009 |
236.6 |
0.086 |
| 2010 |
243.2 |
0.139 |
| 2011 |
246.4 |
0.180 |
| 2012 |
248.5 |
0.205 |
| 2013 |
250.3 |
0.213 |
| 2014 |
252.2 |
0.204 |
| 2015 |
254.3 |
0.181 |
| 2016 |
257.3 |
0.146 |
| 2017 |
262.7 |
0.102 |
| 2018 |
277.2 |
0.054 |
| 2019 |
353.6 |
0.026 |
| 2020 |
47.6 |
0.065 |
| 2021 |
58.5 |
0.113 |
| 2022 |
63.1 |
0.154 |
| 2023 |
65.9 |
0.186 |
| 2024 |
68.0 |
0.203 |
| 2025 |
69.9 |
0.205 |
| 2026 |
71.9 |
0.188 |
| 2027 |
74.7 |
0.154 |
| 2028 |
79.6 |
0.105 |
| 2029 |
96.0 |
0.047 |
| 2030 |
208.1 |
0.032 |
|
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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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