18250-0135 AC   11

 
 
18h 24m 57.21s -01 34' 45.6" P.A. 354.8 sep 0.91 mag 6.71,7.21 Sp F0 dist. 133.51 pc (435.51 l.y.)
 
 
Coord 2000
18250-0135
Discov num
AC   11
Comp
Coord arcsec 2000
18 24 57.21 -01 34 45.6
Date first
1854
Date last
2017
Obs
231
Pa first
178
Pa last
354
P.A. Now (θ)
354.8°
Sep first
0.4
Sep last
0.8
Sep. Now (ρ)
0.91"
Mag pri
6.71
Mag sec
7.21
delta mag (ΔM)
0.5
Spectral class
F0 (yellow-white)
Pri motion ra
+005
Sec motion ra
+005
Pri motion dec
-006
Sec motion dec
-006
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
354.2
Precise sep
0.826
Constellation
Serpens
SAO
142294
HIP
90253
Tycho2
5099-00358-1
Gaia DR2
01112859136
HD
169493
HR
6898
ADS
11324
BD
BD-01 3486
Distance
133.51
Distance ly
435.51
last precise pa
354.2
last precise sep
0.826
 
 
ORBITAL ELEMENTS
 
 
Period (P)340y Periastron (T)1874y Semi-major axis (a)0.675a
Eccentricity (e)0.4 Inclination (i)93.5° Longitude of periastron (ω)25.4°
Node (Ω)175.6° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.898 355.4
2001 0.900 355.4
2002 0.901 355.4
2003 0.903 355.3
2004 0.904 355.3
2005 0.905 355.3
2006 0.906 355.2
2007 0.907 355.2
2008 0.907 355.2
2009 0.908 355.1
2010 0.908 355.1
2011 0.909 355.1
2012 0.909 355.0
2013 0.909 355.0
2014 0.909 355.0
2015 0.909 354.9
2016 0.908 354.9
2017 0.908 354.9
2018 0.908 354.8
2019 0.907 354.8
2020 0.906 354.8
2021 0.905 354.7
2022 0.904 354.7
2023 0.903 354.7
2024 0.902 354.6
2025 0.901 354.6
2026 0.899 354.6
2027 0.898 354.5
2028 0.896 354.5
2029 0.894 354.5
2030 0.892 354.4

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

grafico orbita





wds18250-0135e.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
18250-0135 AC 11 2004 246 355 0.9 6.71 7.21 F0 NOD 182457.21-013445.6
18250-0135 AC 11 2009 249 355 0.9 6.71 7.21 F0 NOD 182457.21-013445.6
18250-0135 AC 11 2010 254 354 0.9 6.71 7.21 F0 NOD 182457.21-013445.6
18250-0135 AC 11 2013 258 355 0.9 6.71 7.21 F0 NOD 182457.21-013445.6
18250-0135 AC 11 2014 227 354 0.9 6.71 7.21 F0 NOD 182457.21-013445.6
18250-0135 AC 11 2017 231 354 0.8 6.71 7.21 F0 NO 182457.21-013445.6

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