17146+1423 STF 2140 AB (Rasalgethi)
17h 14m 38.86s +14° 23' 24.9" P.A. 103.00 sep 4.7 mag 3.48,5.40 Sp M5Ib-II dist. 110.25 pc (359.64 l.y.)
| Coord 2000 |
17146+1423 |
|
Discov num |
STF2140 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 14 38.86 +14 23 24.9 |
|
| Date first |
1777 |
|
Date last |
2020 |
|
Obs |
513 |
|
| Pa first |
117 |
|
Pa last |
102.7 |
|
P.A. Now (θ) |
102.7° |
|
| Sep first |
9.0 |
|
Sep last |
4.68 |
|
Sep. Now (ρ) |
4.68" |
|
| Mag pri |
3.48 |
|
Mag sec |
5.40 |
|
delta mag (ΔM) |
1.92 |
|
Spectral class |
M5Ib-II (red) |
|
| Pri motion ra |
-017 |
|
Sec motion ra |
-007 |
|
| Pri motion dec |
+047 |
|
Sec motion dec |
+033 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.344
This double is physical.
17146+1423 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
102680 |
17 14 39 +14 23 25 |
CHR 139 Aa,Ab |
1991 |
3 |
231 |
0.2 |
3.48 |
|
|
|
|
| Show |
Rasalgethi |
102680 |
17 14 39 +14 23 25 |
STF 2140 AB |
2020 |
513 |
103 |
4.7 |
3.48 |
5.40 |
1.92 |
Y |
<=== |
| Show |
|
102680 |
17 14 39 +14 23 25 |
AGC 16 AC |
2020 |
10 |
296 |
16.6 |
3.48 |
15.50 |
12.02 |
|
|
| Show |
|
102680 |
17 14 39 +14 23 25 |
STF 2140 AD |
2002 |
14 |
39 |
79.2 |
3.48 |
11.10 |
7.62 |
|
|
Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Rasalgethi |
|
Var name |
Alp Her |
|
Constellation |
Hercules |
|
SAO |
102680 |
|
| HIP |
84345 |
|
Tycho2 |
0990-02133-1 |
|
Gaia DR2 |
4541877995116193408 |
|
HD |
156014 |
|
| HR |
6406 |
|
GC |
23277 |
|
ADS |
10418 |
|
BD |
BD+14 3207 |
|
| Bayer |
Alpha 1 Herculis |
|
Bayer name |
Alp1 Her |
|
Flamsteed |
64 Herculis |
|
Flamsteed name |
64 Her |
|
| Distance |
110.25 |
|
Distance ly |
359.64 |
|
Bayer greek |
α1 Her |
|
ORBITAL ELEMENTS
| Period (P) | 3600y | |
Periastron (T) | 1835y | |
Semi-major axis (a) | 4.68a | |
| Eccentricity (e) | 0 | |
Inclination (i) | 155.8° | |
Longitude of periastron (ω) | 0° | |
| Node (Ω) | 119.6° | |
Notes | n | |
Reference | Baz1978 | |
| Equinox | | |
Last observation | 1970 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
104.5 |
4.648 |
| 2001 |
104.4 |
4.648 |
| 2002 |
104.3 |
4.647 |
| 2003 |
104.2 |
4.647 |
| 2004 |
104.1 |
4.647 |
| 2005 |
104.0 |
4.646 |
| 2006 |
103.9 |
4.646 |
| 2007 |
103.8 |
4.645 |
| 2008 |
103.7 |
4.645 |
| 2009 |
103.6 |
4.645 |
| 2010 |
103.6 |
4.644 |
| 2011 |
103.5 |
4.644 |
| 2012 |
103.4 |
4.644 |
| 2013 |
103.3 |
4.643 |
| 2014 |
103.2 |
4.643 |
| 2015 |
103.1 |
4.642 |
| 2016 |
103.0 |
4.642 |
| 2017 |
102.9 |
4.641 |
| 2018 |
102.8 |
4.641 |
| 2019 |
102.7 |
4.641 |
| 2020 |
102.6 |
4.640 |
| 2021 |
102.5 |
4.640 |
| 2022 |
102.4 |
4.639 |
| 2023 |
102.3 |
4.639 |
| 2024 |
102.3 |
4.639 |
| 2025 |
102.2 |
4.638 |
| 2026 |
102.1 |
4.638 |
| 2027 |
102.0 |
4.637 |
| 2028 |
101.9 |
4.637 |
| 2029 |
101.8 |
4.636 |
| 2030 |
101.7 |
4.636 |
|
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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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