19121+0254 AST   1

 
 
19h 12m 14.68s +02 53' 10.7" P.A. 348 sep 0.2 mag 11.29,13.11 Sp M3.5V dist. 10.22 pc (33.34 l.y.)
 
 
Coord 2000
19121+0254
Discov num
AST   1
Comp
Coord arcsec 2000
19 12 14.68 +02 53 10.7
Date first
1982
Date last
2009
Obs
52
Pa first
224
Pa last
348
P.A. Now (θ)
348°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
11.29
Mag sec
13.11
delta mag (ΔM)
1.82
Spectral class
M3.5V (red)
Pri motion ra
+179
Sec motion ra
Pri motion dec
-052
Sec motion dec
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
348.2
Precise sep
0.204
Cdsa2 id
AST 1
Constellation
Aquila
HIP
94349
GL
Gl 748
Ra deg
19.204077777777776
De deg
2.8863055555555555
Distance
10.22
Distance ly
33.34
last precise pa
348.2
last precise sep
0.204
 
 
ORBITAL ELEMENTS
 
 
Period (P)901.7d (2.47y)± 0.3 Periastron (T)50033.2d (1995.862y)± 0.8 Semi-major axis (a)0.148a± 0.0004
Eccentricity (e)0.45± 0.002 Inclination (i)131.6°± 0.3 Longitude of periastron (ω)27.3°± 0.4
Node (Ω)359.6°± 0.2 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000-01-01 0.153 135.0
2001-01-01 0.070 255.1
2002-01-01 0.203 162.3
2003-01-01 0.088 49.9
2004-01-01 0.188 184.0
2005-01-01 0.143 129.6
2006-01-01 0.085 235.0
2007-01-01 0.200 159.3
2008-01-01 0.088 34.6
2009-01-01 0.194 180.8
2010-01-01 0.133 123.4
2011-01-01 0.102 221.3
2012-01-01 0.195 156.3
2013-01-01 0.088 19.4
2014-01-01 0.200 177.8
2015-01-01 0.123 116.1
2016-01-01 0.119 211.6
2017-01-01 0.190 153.1
2018-01-01 0.086 3.8
2019-01-01 0.203 174.9
2020-01-01 0.113 107.6
2021-01-01 0.135 204.3
2022-01-01 0.183 149.7
2023-01-01 0.079 346.5
2024-01-01 0.206 172.0
2025-01-01 0.104 97.5
2026-01-01 0.150 198.5
2027-01-01 0.175 146.0
2028-01-01 0.070 325.1
2029-01-01 0.207 169.3
2030-01-01 0.097 85.7

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

grafico orbita





wds19121%2B0254c.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
19121+0254 AST 1 2001 29 353 0.2 11.29 13.11 M3.5V NODP 191213.55+025315.6
19121+0254 AST 1 2007 30 297 0.1 11.29 13.11 M3.5V NODP 191213.55+025315.6
19121+0254 AST 1 2009 52 348 0.2 11.29 13.11 M3.5V NO P 191214.68+025310.7

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