19474-0148 A  2993

 
 
19h 47m 23.94s -01 48' 28.8" P.A. 260.2 sep 0.1 mag 9.06,9.09 Sp A2 dist. 116.55 pc (380.19 l.y.)
 
 
Coord 2000
19474-0148
Discov num
A  2993
Comp
Coord arcsec 2000
19 47 23.94 -01 48 28.8
Date first
1915
Date last
2017
Obs
26
Pa first
160
Pa last
264
P.A. Now (θ)
260.2°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.1"
Mag pri
9.06
Mag sec
9.09
delta mag (ΔM)
0.03
Spectral class
A2 (white)
Pri motion ra
+005
Sec motion ra
Pri motion dec
-012
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
263.6
Precise sep
0.089
Constellation
Aquila
HIP
97367
HD
186949
ADS
12924
Distance
116.55
Distance ly
380.19
last precise pa
263.6
last precise sep
0.089
 
 
ORBITAL ELEMENTS
 
 
Period (P)138.36y Periastron (T)1984.83y Semi-major axis (a)0.22a
Eccentricity (e)0.075 Inclination (i)116.1° Longitude of periastron (ω)344.4°
Node (Ω)327° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.186 312.9
2001 0.182 311.3
2002 0.178 309.6
2003 0.174 307.8
2004 0.169 305.9
2005 0.165 303.9
2006 0.160 301.8
2007 0.155 299.6
2008 0.149 297.2
2009 0.144 294.6
2010 0.139 291.9
2011 0.134 288.9
2012 0.128 285.7
2013 0.124 282.2
2014 0.119 278.4
2015 0.114 274.3
2016 0.110 269.9
2017 0.107 265.2
2018 0.104 260.2
2019 0.101 255.0
2020 0.099 249.5
2021 0.098 243.8
2022 0.098 238.1
2023 0.099 232.4
2024 0.100 226.8
2025 0.102 221.4
2026 0.105 216.2
2027 0.108 211.3
2028 0.112 206.8
2029 0.116 202.5
2030 0.121 198.6

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

grafico orbita





wds19474-0148b.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
19474-0148 A 2993 1996 21 319 0.2 9.06 9.09 A2 NO 194723.94-014828.8
19474-0148 A 2993 2009 23 296 0.1 9.06 9.09 A2 NO 194723.94-014828.8
19474-0148 A 2993 2014 25 277 0.1 9.06 9.09 A2 O 194723.94-014828.8
19474-0148 A 2993 2017 26 264 0.1 9.06 9.09 A2 O 194723.94-014828.8

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