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16294-2626
GNT 1
Antares

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

16294-2626 GNT 1 (Antares)

16^h 29^m 24.47^s -26° 25' 55.0" P.A. 277.00 sep 2.7 mag 0.96,5.40 Sp M1 dist. 169.78 pc (553.82 l.y.)

Coord 2000	16294-2626		Discov num	GNT 1		Comp			Coord arcsec 2000	16 29 24.47 -26 25 55.0
Date first	1847		Date last	2019		Obs	149
Pa first	273		Pa last	276.9		P.A. Now (θ)	276.9°
Sep first	2.6		Sep last	2.743		Sep. Now (ρ)	2.743"
Mag pri	0.96		Mag sec	5.40		delta mag (ΔM)	4.44		Spectral class	M1 (red)
Pri motion ra	-010		Sec motion ra
Pri motion dec	-020		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Common name	Antares		Constellation	Scorpius		SAO	184415		HIP	80763
Tycho2	6803-02158-1		HD	148478		HR	6134		GC	22157
ADS	10074		CD	CD-2611359		CP	CP-26 5648		Bayer	Alpha Scorpii
Bayer name	Alp Sco		Flamsteed	21 Scorpii		Flamsteed name	21 Sco		FK5	616
Distance	169.78		Distance ly	553.82		Bayer greek	α Sco

Other names

COR SCORPII, KALB AL AKRAB, VESPERTILIO

Meaning

rival of Mars

ORBITAL ELEMENTS

Period (P)	2666.4855y	± 1340.2811	Periastron (T)	2194.6737y	± 392.0113	Semi-major axis (a)	4.38451a	± 2.95015
Eccentricity (e)	0.82117	± 0.14143	Inclination (i)	81.567°	± 5.868	Longitude of periastron (ω)	280.946°	± 15.485
Node (Ω)	101.141°	± 10.661	Notes	n		Reference	Izm2019
Equinox			Last observation	2014		Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	276.0	2.738
2001	276.1	2.732
2002	276.1	2.727
2003	276.1	2.721
2004	276.1	2.716
2005	276.2	2.710
2006	276.2	2.705
2007	276.2	2.699
2008	276.3	2.694
2009	276.3	2.688
2010	276.3	2.682
2011	276.4	2.677
2012	276.4	2.671
2013	276.4	2.665
2014	276.4	2.659
2015	276.5	2.653
2016	276.5	2.647
2017	276.5	2.641
2018	276.6	2.635
2019	276.6	2.629
2020	276.6	2.623
2021	276.7	2.617
2022	276.7	2.611
2023	276.7	2.604
2024	276.8	2.598
2025	276.8	2.592
2026	276.8	2.585
2027	276.9	2.579
2028	276.9	2.572
2029	276.9	2.566
2030	277.0	2.559
2031	277.0	2.552
2032	277.0	2.546
2033	277.1	2.539
2034	277.1	2.532
2035	277.1	2.525
2036	277.2	2.518
2037	277.2	2.511
2038	277.2	2.504
2039	277.3	2.497
2040	277.3	2.490
2041	277.3	2.483
2042	277.4	2.476
2043	277.4	2.468
2044	277.4	2.461
2045	277.5	2.453
2046	277.5	2.446
2047	277.5	2.438
2048	277.6	2.431
2049	277.6	2.423
2050	277.7	2.415

grafico orbita

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

wds16294-2626c.png orbit plot

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