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19143+1904
STF2484

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

19143+1904 STF2484

19^h 14^m 15.66^s +19° 03' 50.3" P.A. 240.90 sep 2.1 mag 7.93,9.51 Sp F8 dist. 67.2 pc (219.21 l.y.)

Coord 2000	19143+1904		Discov num	STF2484		Comp			Coord arcsec 2000	19 14 15.66 +19 03 50.3
Date first	1831		Date last	2017		Obs	124
Pa first	218		Pa last	242		P.A. Now (θ)	240.9°
Sep first	2.5		Sep last	2.1		Sep. Now (ρ)	2.06"
Mag pri	7.93		Mag sec	9.51		delta mag (ΔM)	1.58		Spectral class	F8 (yellow-white)
Pri motion ra	+032		Sec motion ra	+032
Pri motion dec	-027		Sec motion dec	-027
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	241.7		Precise sep	2.109		Constellation	Sagitta		SAO	104635
HIP	94520		Tycho2	1607-00899-1		Gaia DR2	4516054074788081152		HD	180054
ADS	12201		BD	BD+18 3998		Distance	67.2		Distance ly	219.21
last precise pa	241.7		last precise sep	2.109

ORBITAL ELEMENTS

Period (P)	1500.4372y	± 606.2944	Periastron (T)	2113.8041y	± 111.9268	Semi-major axis (a)	4.31198a	± 1.87027
Eccentricity (e)	0.88995	± 0.25371	Inclination (i)	73.076°	± 7.289	Longitude of periastron (ω)	272.338°	± 14.293
Node (Ω)	79.874°	± 33.941	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2015

label	rho	theta
2000	2.187	238.1
2001	2.182	238.2
2002	2.176	238.4
2003	2.171	238.5
2004	2.165	238.6
2005	2.160	238.7
2006	2.154	238.9
2007	2.148	239.0
2008	2.142	239.1
2009	2.136	239.3
2010	2.130	239.4
2011	2.124	239.5
2012	2.118	239.6
2013	2.112	239.8
2014	2.106	239.9
2015	2.099	240.0
2016	2.093	240.2
2017	2.086	240.3
2018	2.079	240.5
2019	2.073	240.6
2020	2.066	240.7
2021	2.059	240.9
2022	2.052	241.0
2023	2.045	241.1
2024	2.037	241.3
2025	2.030	241.4
2026	2.023	241.6
2027	2.015	241.7
2028	2.008	241.9
2029	2.000	242.0
2030	1.992	242.2

grafico orbita

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

wds19143%2B1904b.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
19143+1904	STF2484		2007	116	239	2.3	7.93	9.51	F8	NOD	191415.66+190350.3
19143+1904	STF2484		2008	118	239	2.3	7.93	9.51	F8	NOD	191415.66+190350.3
19143+1904	STF2484		2010	121	240	2.1	7.93	9.51	F8	NOD	191415.66+190350.3
19143+1904	STF2484		2011	124	239	2.0	7.93	9.51	F8	NOD	191415.66+190350.3
19143+1904	STF2484		2015	118	241	2.1	7.93	9.51	F8	NO	191415.66+190350.3
19143+1904	STF2484		2017	121	242	2.1	7.93	9.51	F8	NO	191415.66+190350.3

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