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07201+2159
STF 1066
Wasat

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

07201+2159 STF 1066 (Wasat)

07^h 20^m 07.39^s +21° 58' 56.4" P.A. 229.00 sep 5.5 mag 3.55,8.18 Sp F2V+K6V dist. 18.54 pc (60.48 l.y.)

Coord 2000	07201+2159		Discov num	STF1066		Comp			Coord arcsec 2000	07 20 07.39 +21 58 56.4
Date first	1822		Date last	2018		Obs	274
Pa first	198		Pa last	228.9		P.A. Now (θ)	228.9°
Sep first	7.1		Sep last	5.541		Sep. Now (ρ)	5.541"
Mag pri	3.55		Mag sec	8.18		delta mag (ΔM)	4.63		Spectral class	F2V+K6V (yellow-white/yellow-orange)
Pri motion ra	-028		Sec motion ra	-028
Pri motion dec	-015		Sec motion dec	-013
Notes	N O T (See Notes, Orbital solution, Parallax indicates physical)

rPM=0.063 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Common name	Wasat		Constellation	Gemini		SAO	79294		HIP	35550
Tycho2	1359-02672-1		Gaia DR2	866177431953646464		HD	56986		HR	2777
GC	9755		ADS	5983		GL	Gl 271A		BD	BD+22 1645
Bayer	Delta Geminorum		Bayer name	Del Gem		Flamsteed	55 Geminorum		Flamsteed name	55 Gem
FK5	279		Distance	18.54		Distance ly	60.48		Bayer greek	δ Gem

Other names

Wesat

Meaning

the center of the sky

ORBITAL ELEMENTS

Period (P)	1418.4375y	± 625.7623	Periastron (T)	2150.9833y	± 47.4472	Semi-major axis (a)	7.76117a	± 2.62776
Eccentricity (e)	0.70913	± 0.24789	Inclination (i)	51.036°	± 13.893	Longitude of periastron (ω)	268.361°	± 11.904
Node (Ω)	70.828°	± 34.531	Notes	n		Reference	Izm2019
Equinox			Last observation	2013		Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	224.9	5.827
2001	225.1	5.812
2002	225.3	5.796
2003	225.5	5.781
2004	225.7	5.765
2005	225.9	5.750
2006	226.1	5.734
2007	226.3	5.718
2008	226.5	5.702
2009	226.7	5.686
2010	227.0	5.669
2011	227.2	5.653
2012	227.4	5.637
2013	227.6	5.620
2014	227.8	5.603
2015	228.0	5.586
2016	228.2	5.569
2017	228.5	5.552
2018	228.7	5.535
2019	228.9	5.517
2020	229.1	5.499
2021	229.4	5.482
2022	229.6	5.464
2023	229.8	5.446
2024	230.0	5.427
2025	230.3	5.409
2026	230.5	5.391
2027	230.7	5.372
2028	231.0	5.353
2029	231.2	5.334
2030	231.4	5.315

grafico orbita

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

wds07201%2B2159c.png orbit plot

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

SUSPECTED ORBITAL ELEMENTS

Identifier	07201+2159 STF1066 A
coord_arcsec_2000	072007.39+215856.4

Period (P)	2238.6001d (6.13y)		Periastron (T)	15466.5d (1901.222y)		Semi-major axis (a)	14.31m	± 16.41
Eccentricity (e)	0.353		Inclination (i)	92.4°	± 3.89	Longitude of periastron (ω)	214.6°
Node (Ω)	70.04°	± 9.45	Notes	n		Reference	HIP1997d
Equinox			Last observation	1991		Grade	9	(1=Definitive, 9=Indet.)

label	theta	rho
2000-01-01	75.6	0.005
2001-01-01	70.5	0.016
2002-01-01	69.0	0.018
2003-01-01	66.7	0.011
2004-01-01	296.2	0.001
2005-01-01	250.7	0.010
2006-01-01	81.0	0.002
2007-01-01	70.7	0.016
2008-01-01	69.2	0.018
2009-01-01	67.1	0.012
2010-01-01	36.1	0.001
2011-01-01	251.4	0.009
2012-01-01	169.9
2013-01-01	71.0	0.015
2014-01-01	69.4	0.018
2015-01-01	67.5	0.013
2016-01-01	55.3	0.003
2017-01-01	252.1	0.009
2018-01-01	240.9	0.003
2019-01-01	71.3	0.013
2020-01-01	69.5	0.018
2021-01-01	67.8	0.014
2022-01-01	60.6	0.004
2023-01-01	253.0	0.008
2024-01-01	245.9	0.005
2025-01-01	71.7	0.012
2026-01-01	69.7	0.018
2027-01-01	68.1	0.015
2028-01-01	63.1	0.006
2029-01-01	254.3	0.006
2030-01-01	247.8	0.007

grafico orbita

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

wds07201%2B2159r.png orbit plot

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