11125-1830 BU  220 (Psi Crt)

 
 
11H 12M 30.37S -18 29' 59.5" P.A. 312.5 SEP 0.25 MAG 6.24,8.34 SP A1V DIST. 153.85 PC (501.86 L.Y.)
 
 
Coord 2000
11125-1830
Discov num
BU  220
Comp
Coord arcsec 2000
11 12 30.37 -18 29 59.5
Date first
1875
Date last
2014
Obs
93
Pa first
144
Pa last
316
P.A. Now (θ)
312.5°
Sep first
0.6
Sep last
0.3
Sep. Now (ρ)
0.25"
Mag pri
6.24
Mag sec
8.34
delta mag (ΔM)
2.1
Spectral class
A1V (white)
Pri motion ra
-021
Sec motion ra
-021
Pri motion dec
-027
Sec motion dec
-027
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Psi Crt
Constellation
Crater
SAO
156528
HIP
54742
Tycho2
6087-01749-1
HD
97411
HR
4347
GC
15405
ADS
8086
BD
BD-17 3321
Bayer
Psi Crateris
Bayer name
Psi Crt
Distance
153.85
Distance ly
501.86
last precise pa
315.8
last precise sep
0.265
 
 
ORBITAL ELEMENTS
 
 
Period (P)365.68y± 8.02 Periastron (T)1983.93y± 3.59 Semi-major axis (a)0.553a± 0.022
Eccentricity (e)0.434± 0.014 Inclination (i)99.8°± 0.8 Longitude of periastron (ω)337.3°± 6.7
Node (Ω)325.3°± 0.6 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.321 321.9
2001 0.319 321.4
2002 0.317 321.0
2003 0.314 320.5
2004 0.311 320.0
2005 0.308 319.5
2006 0.305 319.1
2007 0.301 318.6
2008 0.297 318.0
2009 0.292 317.5
2010 0.288 317.0
2011 0.283 316.4
2012 0.278 315.8
2013 0.273 315.2
2014 0.267 314.6
2015 0.261 313.9
2016 0.255 313.2
2017 0.249 312.5
2018 0.243 311.7
2019 0.237 310.9
2020 0.230 310.1
2021 0.224 309.2
2022 0.217 308.2
2023 0.211 307.2
2024 0.204 306.1
2025 0.197 305.0
2026 0.190 303.8
2027 0.183 302.4
2028 0.177 301.0
2029 0.170 299.5
2030 0.163 297.8

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