11471-1149 RST 3756 AB

11^h 47^m 03.83^s -11° 49' 26.5" P.A. 143.00 sep 1.1 mag 9.21,12.71 Sp K2 dist. 25.36 pc (82.72 l.y.)

Coord 2000	11471-1149		Discov num	RST3756		Comp	AB		Coord arcsec 2000	11 47 03.83 -11 49 26.5
Date first	1937		Date last	2021		Obs	19
Pa first	35		Pa last	143.1		P.A. Now (θ)	143.1°
Sep first	0.7		Sep last	1.143		Sep. Now (ρ)	1.143"
Mag pri	9.21		Mag sec	12.71		delta mag (ΔM)	3.5		Spectral class	K2 (yellow-orange)
Pri motion ra	-199		Sec motion ra	-206
Pri motion dec	-060		Sec motion dec	-061
Notes	O (Orbital solution)

rPM=0.033 (< 0.3, Physical double)

This double is physical.

11471-1149 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		156885	11 47 04 -11 49 26	RST 3756 AB	2021	19	143	1.1	9.21	12.71	3.50	Y	<===
Show		156885	11 47 04 -11 49 26	LAF 45 AC	2005	1	42	5.7	6.40	21.40	15.00
Show		156885	11 47 04 -11 49 26	LAF 45 AD	2005	1	309	10.6	6.40	21.40	15.00

Quadruple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Crater		SAO	156885		HIP	57494		Tycho2	5520-01237-1
Gaia DR2	3585636855608873984		HD	102392		GL	Gl 444A		BD	BD-11 3178
Distance	25.36		Distance ly	82.72

ORBITAL ELEMENTS

Period (P)	121.3y	± 2.8	Periastron (T)	1955.7y	± 2.8	Semi-major axis (a)	0.982a	± 0.013
Eccentricity (e)	0.176	± 0.011	Inclination (i)	152.3°	± 2.2	Longitude of periastron (ω)	178.7°	± 16.6
Node (Ω)	151.4°	± 7.4	Notes			Reference	Tok2021f
Equinox			Last observation	2021		Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	184.9	1.067
2001	182.7	1.077
2002	180.6	1.086
2003	178.5	1.095
2004	176.4	1.103
2005	174.4	1.110
2006	172.4	1.117
2007	170.4	1.124
2008	168.4	1.130
2009	166.5	1.135
2010	164.5	1.140
2011	162.6	1.144
2012	160.7	1.148
2013	158.8	1.150
2014	157.0	1.152
2015	155.1	1.154
2016	153.2	1.155
2017	151.3	1.155
2018	149.5	1.154
2019	147.6	1.153
2020	145.7	1.151
2021	143.8	1.148
2022	141.9	1.145
2023	140.0	1.141
2024	138.1	1.137
2025	136.2	1.132
2026	134.2	1.126
2027	132.2	1.119
2028	130.2	1.112
2029	128.2	1.105
2030	126.1	1.097

grafico orbita

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

wds11471-1149b.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic