21395-0003 BU 1212AB (24 Aqr)

 
 
21h 39m 31.39s -00 03' 04.1" P.A. 310.4 sep 0.24 mag 6.94,8.44 Sp F6V dist. 43.98 pc (143.46 l.y.)
 
 
Coord 2000
21395-0003
Discov num
BU 1212
Comp
AB
Coord arcsec 2000
21 39 31.39 -00 03 04.1
Date first
1890
Date last
2017
Obs
264
Pa first
255
Pa last
307
P.A. Now (θ)
310.4°
Sep first
0.5
Sep last
0.3
Sep. Now (ρ)
0.24"
Mag pri
6.94
Mag sec
8.44
delta mag (ΔM)
1.5
Spectral class
F6V (yellow-white)
Pri motion ra
+228
Sec motion ra
+228
Pri motion dec
+015
Sec motion dec
+015
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
21395-0003 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 24 Aqr 21395-0003 BU 1212 AB 1890 2017 264 310 0.2 6.94 8.44 1.50 Y <===
Show 21395-0003 BU 1212 AB,C 1891 2013 20 178 36.2 6.63 11.75 5.12
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
306.6
Precise sep
0.284
Name
24 Aqr
Constellation
Aquarius
HIP
106942
Tycho2
5209-00253-1
HD
206058
GC
30314
ADS
15176
Flamsteed
24 Aquarii
Flamsteed name
24 Aqr
Distance
43.98
Distance ly
143.46
last precise pa
306.6
last precise sep
0.284
 
 
ORBITAL ELEMENTS
 
 
Period (P)48.65y Periastron (T)1971.55y Semi-major axis (a)0.448a
Eccentricity (e)0.868 Inclination (i)58° Longitude of periastron (ω)293°
Node (Ω)139.3° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.540 273.7
2001 0.542 275.0
2002 0.542 276.3
2003 0.540 277.7
2004 0.538 279.0
2005 0.534 280.4
2006 0.528 281.8
2007 0.521 283.2
2008 0.512 284.6
2009 0.501 286.2
2010 0.488 287.8
2011 0.472 289.5
2012 0.454 291.3
2013 0.432 293.3
2014 0.407 295.5
2015 0.377 298.0
2016 0.341 301.1
2017 0.296 304.9
2018 0.239 310.4
2019 0.161 320.3
2020 0.038 20.7
2021 0.111 155.8
2022 0.151 178.5
2023 0.179 192.9
2024 0.203 203.6
2025 0.227 212.1
2026 0.250 219.0
2027 0.272 224.8
2028 0.293 229.7
2029 0.313 233.9
2030 0.333 237.7

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

grafico orbita





wds21395-0003b.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
21395-0003 BU 1212 AB 2004 264 280 0.5 6.94 8.44 F6V NOD 213931.39-000304.1
21395-0003 BU 1212 AB 2008 270 285 0.5 6.94 8.44 F6V NOD 213931.39-000304.1
21395-0003 BU 1212 AB 2009 273 286 0.5 6.94 8.44 F6V NOD 213931.39-000304.1
21395-0003 BU 1212 AB 2015 260 300 0.4 6.94 8.44 F6V NO 213931.39-000304.1
21395-0003 BU 1212 AB 2017 264 307 0.3 6.94 8.44 F6V NO 213931.39-000304.1

If you need more information about this double, apply for a data request form to the WDS.