17146+1423 STF2140AB (Rasalgethi)

 
 
17H 14M 38.86S +14 23' 24.9" P.A. 103 SEP 4.64 MAG 3.48,5.4 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
2015
Obs
491
Pa first
117
Pa last
104
P.A. Now (θ)
103°
Sep first
9
Sep last
4.9
Sep. Now (ρ)
4.64"
Mag pri
3.48
Mag sec
5.4
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=0.34
 
 
17146+1423 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 102680 17146+1423 CHR 139 Aa,Ab 1986 1991 3 231 0.2 3.48
Show Rasalgethi 102680 17146+1423 STF2140 AB 1777 2015 491 103 4.6 3.48 5.40 1.92 Y <===
Show 102680 17146+1423 AGC 16 AC 1888 1995 8 297 19.9 3.48 15.50 12.02
Show 102680 17146+1423 STF2140 AD 1878 2002 14 39 79.2 3.48 11.10 7.62
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name
Rasalgethi
Constellation
Hercules
SAO
102680
HIP
84345
Tycho2
0990-02133-1
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
last precise pa
103.8
last precise sep
4.89
 
 
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)
Node (Ω)119.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation1970
label rho theta
2000 4.648 104.5
2001 4.648 104.4
2002 4.647 104.3
2003 4.647 104.2
2004 4.647 104.1
2005 4.646 104.0
2006 4.646 103.9
2007 4.645 103.8
2008 4.645 103.7
2009 4.645 103.6
2010 4.644 103.6
2011 4.644 103.5
2012 4.644 103.4
2013 4.643 103.3
2014 4.643 103.2
2015 4.642 103.1
2016 4.642 103.0
2017 4.641 102.9
2018 4.641 102.8
2019 4.641 102.7
2020 4.640 102.6
2021 4.640 102.5
2022 4.639 102.4
2023 4.639 102.3
2024 4.639 102.3
2025 4.638 102.2
2026 4.638 102.1
2027 4.637 102.0
2028 4.637 101.9
2029 4.636 101.8
2030 4.636 101.7

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6