01398-5612 DUN   5 (p Eri)

 
 
01H 39M 47.83S -56 11' 36.0" P.A. 186.5 SEP 11.62 MAG 5.78,5.90 SP K0V+K5V DIST. 7.82 PC (25.51 L.Y.)
 
 
Coord 2000
01398-5612
Discov num
DUN   5
Comp
Coord arcsec 2000
01 39 47.83 -56 11 36.0
Date first
1825
Date last
2016
Obs
167
Pa first
343
Pa last
186
P.A. Now (θ)
186.5°
Sep first
2.5
Sep last
11.5
Sep. Now (ρ)
11.62"
Mag pri
5.78
Mag sec
5.90
delta mag (ΔM)
0.12
Spectral class
K0V+K5V (yellow-orange/yellow-orange)
Pri motion ra
+322
Sec motion ra
+206
Pri motion dec
+096
Sec motion dec
-108
Notes
N O (See Notes, Orbital solution)
rPM=0.698
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Other name
p Eri
Constellation
Eridanus
SAO
232492
HIP
7751
Tycho2
8478-01394-2
HD
10360
HR
486
GC
2030
GL
Gl 66B
CD
CD-56 328
CP
CP-56 329
Distance
7.82
Distance ly
25.51
last precise pa
186.2
last precise sep
11.45
 
 
ORBITAL ELEMENTS
 
 
Period (P)475.2y Periastron (T)1811.9y Semi-major axis (a)7.826a
Eccentricity (e)0.513 Inclination (i)140.5° Longitude of periastron (ω)18.6°
Node (Ω)13.7° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2013
label rho theta
2000 11.450 190.4
2001 11.464 190.2
2002 11.477 190.0
2003 11.489 189.7
2004 11.501 189.5
2005 11.512 189.3
2006 11.524 189.0
2007 11.534 188.8
2008 11.544 188.6
2009 11.554 188.3
2010 11.564 188.1
2011 11.572 187.9
2012 11.581 187.7
2013 11.589 187.4
2014 11.597 187.2
2015 11.604 187.0
2016 11.610 186.7
2017 11.617 186.5
2018 11.623 186.3
2019 11.628 186.1
2020 11.633 185.8
2021 11.638 185.6
2022 11.642 185.4
2023 11.646 185.1
2024 11.649 184.9
2025 11.652 184.7
2026 11.655 184.5
2027 11.657 184.2
2028 11.658 184.0
2029 11.660 183.8
2030 11.660 183.6

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