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Doubles in this session

Current system

19540+1518
STF2596

Nearby doubles

12' : 19544+1508
BPM1816

16' : 19537+1502
BPM1794AB

17' : 19552+1518
A 1661

17' : 19529+1521
BPM1779

18' : 19543+1500
BPM1812

20' : 19527+1519
BPM1774

24' : 19545+1455
BPM1820

25' : 19545+1454
BPM1819

26' : 19543+1452
BPM1813

26' : 19523+1514
BPM1759

28' : 19522+1519
BPM1751AB

28' : 19535+1544
TDT1829

28' : 19522+1511
BPM1755

28' : 19558+1527
BPM1833

30' : 19538+1449
BPM1796

30' : 19526+1539
BPMA198

30' : 19521+1509
BPM1744AB

31' : 19528+1542
BPM1777

33' : 19559+1459
BPM1837

35' : 19520+1536
BPM1743

37' : 19515+1520
BPM1725

37' : 19519+1536
BPM1738

37' : 19522+1452
BPM1753

38' : 19564+1533
BPM1844

39' : 19524+1548
BPM1765

40' : 19520+1543
BPM1742

Selections

Binocular doubles

Quadruple Systems

Multiple Systems

Neglected List I

Neglected List II

Herschel, J.F.W.

19540+1518 STF2596

19^h 54^m 01.95^s +15° 17' 31.7" P.A. 296.30 sep 2.0 mag 7.29,8.68 Sp F8V dist. 82.58 pc (269.38 l.y.)

Coord 2000	19540+1518		Discov num	STF2596		Comp			Coord arcsec 2000	19 54 01.95 +15 17 31.7
Date first	1828		Date last	2016		Obs	190
Pa first	355		Pa last	297		P.A. Now (θ)	296.3°
Sep first	2.1		Sep last	2.1		Sep. Now (ρ)	1.97"
Mag pri	7.29		Mag sec	8.68		delta mag (ΔM)	1.39		Spectral class	F8V (yellow-white)
Pri motion ra	-012		Sec motion ra	-012
Pri motion dec	-009		Sec motion dec	-009
Notes	O (Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	297.3		Precise sep	2.147		Constellation	Aquila		SAO	105396
HIP	97922		Tycho2	1616-00256-1		Gaia DR2	95307811712		HD	188328
ADS	13082		BD	BD+14 4083		Distance	82.58		Distance ly	269.38
last precise pa	297.3		last precise sep	2.147

ORBITAL ELEMENTS

Period (P)	2971.0861y	± 1397.0172	Periastron (T)	2354.1964y	± 226.1355	Semi-major axis (a)	8.50966a	± 4.29319
Eccentricity (e)	0.8412	± 0.12277	Inclination (i)	102.104°	± 6.864	Longitude of periastron (ω)	242.962°	± 19.747
Node (Ω)	54.788°	± 25.109	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2015

label	rho	theta
2000	1.963	301.7
2001	1.963	301.5
2002	1.963	301.2
2003	1.964	300.9
2004	1.964	300.7
2005	1.964	300.4
2006	1.965	300.2
2007	1.965	299.9
2008	1.966	299.7
2009	1.966	299.4
2010	1.967	299.1
2011	1.967	298.9
2012	1.968	298.6
2013	1.968	298.4
2014	1.969	298.1
2015	1.969	297.9
2016	1.970	297.6
2017	1.971	297.3
2018	1.972	297.1
2019	1.972	296.8
2020	1.973	296.6
2021	1.974	296.3
2022	1.975	296.1
2023	1.976	295.8
2024	1.977	295.6
2025	1.977	295.3
2026	1.978	295.1
2027	1.979	294.8
2028	1.980	294.5
2029	1.982	294.3
2030	1.983	294.0

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

grafico orbita

wds19540%2B1518a.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
19540+1518	STF2596		2005	191	301	2.0	7.29	8.68	F8V	D	195401.95+151731.7
19540+1518	STF2596		2007	193	300	2.1	7.29	8.68	F8V	D	195401.95+151731.7
19540+1518	STF2596		2010	195	299	1.8	7.29	8.68	F8V	D	195401.95+151731.7
19540+1518	STF2596		2011	198	298	2.0	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2012	186	298	2.0	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2013	187	298	2.0	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2014	188	297	2.1	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2016	189	297	2.1	7.29	8.68	F8V		195401.95+151731.7

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