09001-1228 HU  225AB

 
 
09H 00M 05.14S -12 27' 39.4" P.A. 266.1 SEP 0.43 MAG 9.18,8.60 SP F7V DIST. 101.01 PC (329.49 L.Y.)
 
 
Coord 2000
09001-1228
Discov num
HU  225
Comp
AB
Coord arcsec 2000
09 00 05.14 -12 27 39.4
Date first
1900
Date last
2011
Obs
51
Pa first
280
Pa last
259
P.A. Now (θ)
266.1°
Sep first
0.3
Sep last
0.4
Sep. Now (ρ)
0.43"
Mag pri
9.18
Mag sec
8.60
delta mag (ΔM)
0.58
Spectral class
F7V (yellow-white)
Pri motion ra
-063
Sec motion ra
-063
Pri motion dec
+002
Sec motion dec
+002
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
09001-1228 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 154820 09001-1228 HU 225 AB 1900 2011 51 266 0.4 9.18 8.60 0.58 Y <===
Show 154820 09001-1228 WOR 36 AB,C 1972 1976 2 135 5.2 8.16 14.00 5.84
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
SAO
154820
HIP
44190
Tycho2
5452-02085-1
HD
77126
ADS
7131
BD
BD-11 2520
Distance
101.01
Distance ly
329.49
last precise pa
259.3
last precise sep
0.446
 
 
ORBITAL ELEMENTS
 
 
Period (P)125.94y Periastron (T)1944.21y Semi-major axis (a)0.341a
Eccentricity (e)0.331 Inclination (i)46° Longitude of periastron (ω)9.5°
Node (Ω)68.4° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2011
label rho theta
2000 0.450 247.4
2001 0.451 248.4
2002 0.452 249.5
2003 0.452 250.6
2004 0.452 251.6
2005 0.452 252.7
2006 0.452 253.8
2007 0.451 254.8
2008 0.450 255.9
2009 0.448 257.0
2010 0.447 258.1
2011 0.444 259.2
2012 0.442 260.3
2013 0.439 261.4
2014 0.436 262.5
2015 0.433 263.7
2016 0.430 264.9
2017 0.426 266.1
2018 0.422 267.3
2019 0.417 268.5
2020 0.412 269.8
2021 0.407 271.1
2022 0.402 272.4
2023 0.397 273.8
2024 0.391 275.2
2025 0.385 276.6
2026 0.379 278.1
2027 0.372 279.7
2028 0.366 281.3
2029 0.359 282.9
2030 0.352 284.6

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