16003-2237 LAB   3 (Dschubba)

 
 
16H 00M 20.01S -22 37' 17.8" P.A. 357.4 SEP 0.19 MAG 2.39,4.62 SP BE DIST. 150.6 PC (491.26 L.Y.)
 
 
Coord 2000
16003-2237
Discov num
LAB   3
Comp
Coord arcsec 2000
16 00 20.01 -22 37 17.8
Date first
1973
Date last
2015
Obs
193
Pa first
171
Pa last
351
P.A. Now (θ)
357.4°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.19"
Mag pri
2.39
Mag sec
4.62
delta mag (ΔM)
2.23
Spectral class
Be (blue-white)
Pri motion ra
-012
Sec motion ra
Pri motion dec
-022
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name
Dschubba
Meaning
before
Other names
ICLARKRAU
Constellation
Scorpius
SAO
184014
HIP
78401
HD
143275
HR
5953
GC
21489
BD
BD-22 4068
CD
CD-2211292
CP
CP-22 6106
Bayer
Delta Scorpii
Bayer name
Del Sco
Flamsteed
7 Scorpii
Flamsteed name
7 Sco
Distance
150.6
Distance ly
491.26
last precise pa
350.9
last precise sep
0.185
 
 
ORBITAL ELEMENTS
 
 
Period (P)3945.4d (10.8y)± 2.8 Periastron (T)55745.29m (2011.503y)± 0.19 Semi-major axis (a)98.94m± 0.14
Eccentricity (e)0.9373± 0.0009 Inclination (i)34.12°± 0.79 Longitude of periastron (ω)359.5°± 2.5
Node (Ω)175°± 2.1 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2011
label rho theta
2000 0.073 16.8
2001 0.040 319.8
2002 0.108 339.3
2003 0.147 345.1
2004 0.172 348.8
2005 0.186 351.7
2006 0.192 354.3
2007 0.188 356.9
2008 0.176 359.7
2009 0.153 3.2
2010 0.118 8.3
2011 0.058 21.1
2012 0.058 327.8
2013 0.117 340.8
2014 0.153 346.0
2015 0.176 349.4
2016 0.188 352.2
2017 0.192 354.8
2018 0.187 357.4
2019 0.172 0.3
2020 0.148 4.0
2021 0.108 9.8
2022 0.041 28.9
2023 0.073 332.2
2024 0.126 342.1
2025 0.159 346.7
2026 0.179 350.0
2027 0.190 352.8
2028 0.191 355.3
2029 0.184 358.0
2030 0.168 1.0

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic