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22134-3729
B 2056

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

22134-3729 B 2056

22^h 13^m 23.95^s -37° 29' 02.5" P.A. 161.60 sep 0.2 mag 8.50,8.60 Sp F0IV

Coord 2000	22134-3729		Discov num	B 2056		Comp			Coord arcsec 2000	22 13 23.95 -37 29 02.5
Date first	1934		Date last	2019		Obs	19
Pa first	161		Pa last	343		P.A. Now (θ)	161.6°
Sep first	0.2		Sep last	0.2		Sep. Now (ρ)	0.21"
Mag pri	8.50		Mag sec	8.60		delta mag (ΔM)	0.1		Spectral class	F0IV (yellow-white)
Pri motion ra	+063		Sec motion ra
Pri motion dec	-013		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	343.3		Precise sep	0.204		Constellation	Grus		SAO	213645
Tycho2	7502-00104-1		Gaia DR2	6574109597341814784		HD	210767		last precise pa	343.3
last precise sep	0.204

ORBITAL ELEMENTS

Period (P)	83.94y		Periastron (T)	2039.42y		Semi-major axis (a)	0.212a
Eccentricity (e)	0.06		Inclination (i)	109.6°		Longitude of periastron (ω)	77.4°
Node (Ω)	158.8°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2018

label	rho	theta
2000	0.076	257.3
2001	0.075	246.0
2002	0.077	234.8
2003	0.081	224.5
2004	0.088	215.4
2005	0.095	207.7
2006	0.104	201.2
2007	0.113	195.7
2008	0.123	191.0
2009	0.133	187.1
2010	0.142	183.6
2011	0.152	180.7
2012	0.160	178.0
2013	0.169	175.6
2014	0.177	173.5
2015	0.184	171.5
2016	0.190	169.6
2017	0.196	167.9
2018	0.200	166.3
2019	0.204	164.7
2020	0.207	163.1
2021	0.208	161.6
2022	0.209	160.2
2023	0.208	158.7
2024	0.207	157.2
2025	0.204	155.7
2026	0.200	154.1
2027	0.196	152.4
2028	0.190	150.7
2029	0.183	148.8
2030	0.175	146.8

grafico orbita

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

wds22134-3729b.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
22134-3729	B 2056		1991	12	316	0.2	8.50	8.60	F0IV		221323.95-372902.5
22134-3729	B 2056		2008	14	189	0.1	8.50	8.60	F0IV		221323.95-372902.5
22134-3729	B 2056		2010	15	180	0.2	8.50	8.60	F0IV		221323.95-372902.5
22134-3729	B 2056		2013	16	174	0.2	8.50	8.60	F0IV	O	221323.95-372902.5
22134-3729	B 2056		2015	17	171	0.2	8.50	8.60	F0IV	O	221323.95-372902.5
22134-3729	B 2056		2018	18	345	0.2	8.50	8.60	F0IV	O	221323.95-372902.5
22134-3729	B 2056		2019	19	343	0.2	8.50	8.60	F0IV	O	221323.95-372902.5

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