19098-1948 B   427

 
 
19h 09m 48.13s -19 48' 12.4" P.A. 183 sep 0.1 mag 7.00,7.10 Sp K2IV dist. 118.48 pc (386.48 l.y.)
 
 
Coord 2000
19098-1948
Discov num
B   427
Comp
Coord arcsec 2000
19 09 48.13 -19 48 12.4
Date first
1925
Date last
2007
Obs
19
Pa first
276
Pa last
183
P.A. Now (θ)
183°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.1"
Mag pri
7.00
Mag sec
7.10
delta mag (ΔM)
0.1
Spectral class
K2IV (yellow-orange)
Pri motion ra
+028
Sec motion ra
Pri motion dec
-084
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
182.9
Precise sep
0.05
Constellation
Sagittarius
SAO
162260
HIP
94144
HD
178555
HR
7265
ADS
12096
Distance
118.48
Distance ly
386.48
last precise pa
182.9
last precise sep
0.05
 
 
ORBITAL ELEMENTS
 
 
Period (P)2.68y Periastron (T)1931.81y Semi-major axis (a)0.129a
Eccentricity (e)0.53 Inclination (i)45.6° Longitude of periastron (ω)86.1°
Node (Ω)45° Note Grade5(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.140 299.1
2001 0.120 13.8
2002 0.127 251.2
2003 0.137 321.3
2004 0.079 54.9
2005 0.139 274.7
2006 0.133 344.6
2007 0.072 204.5
2008 0.140 296.4
2009 0.123 10.2
2010 0.124 247.8
2011 0.137 318.5
2012 0.087 47.2
2013 0.138 271.9
2014 0.134 341.6
2015 0.061 192.4
2016 0.140 293.7
2017 0.125 6.8
2018 0.120 244.2
2019 0.138 315.7
2020 0.094 40.8
2021 0.137 269.2
2022 0.134 338.6
2023 0.051 175.3
2024 0.140 291.0
2025 0.126 3.4
2026 0.116 240.4
2027 0.138 312.9
2028 0.101 35.2
2029 0.136 266.3
2030 0.135 335.7

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

grafico orbita





wds19098-1948a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19098-1948 B 427 1989 18 250 0.1 7.00 7.10 K2IV NO 190948.13-194812.4
19098-1948 B 427 2007 19 183 0.1 7.00 7.10 K2IV NO 190948.13-194812.4

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