17563-1549 WAI 1 Aa1,2

Coord 2000	17563-1549		Discov num	WAI   1		Comp	Aa1,2		Coord arcsec 2000	17 56 19.04 -15 48 44.5
Date first	2014		Date last	2022		Obs	2
Pa first	138		Pa last	156.5		P.A. Now (θ)	156.5°
Sep first	0.0		Sep last	0.002		Sep. Now (ρ)	0.002"
Mag pri	6.45		Mag sec	7.50		delta mag (ΔM)	1.05		Spectral class	A1V (white)
Pri motion ra	-010		Sec motion ra	-003
Pri motion dec	-065		Sec motion dec	-068
Notes	N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes rPM=0.112 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		160915	17 56 19 -15 48 44	WAI 1 Aa1,2	2022	2	157	0.0	6.45	7.50	1.05	Y	<===
Show		160915	17 56 19 -15 48 44	WAI 1 Aa,Ab	2022	4	339	0.4	6.10	6.97	0.87	Y
Show	HD 163336	160915	17 56 19 -15 48 44	HJ 2814 AB	2006	21	157	20.6	5.93	9.16	3.23
Show		160915	17 56 19 -15 48 44	HJ 2814 AC	2000	6	350	39.3	5.93	12.59	6.66
Show		160915	17 56 19 -15 48 44	DRS 62 AD	2021	5	39	2.6	5.70	12.40	6.70

Sextuple system
4 estimated visually detectable stars in this system

Constellation	Serpens		SAO	160915		HIP	87813		Tycho2	6250-00386-1
HD	163336		HR	6681		ADS	10891		BD	BD-15 4722
Distance	73.96		Distance ly	241.26

Period (P)	13.4191d	± 0.0003	Periastron (T)	57900d (2017.401y)	± 0.2	Semi-major axis (a)	2m	± 0.1
Eccentricity (e)	0.36		Inclination (i)	151°	± 17	Longitude of periastron (ω)	52.3°	± 4.7
Node (Ω)	306.3°	± 5.8	Notes	n		Reference	WAI2023
Equinox			Last observation			Grade	3	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 100.0 0.003 2001-01-01 58.8 0.002 2002-01-01 359.1 0.002 2003-01-01 229.6 0.001 2004-01-01 125.7 0.002 2005-01-01 83.6 0.003 2006-01-01 37.9 0.002 2007-01-01 320.6 0.002 2008-01-01 167.2 0.002 2009-01-01 106.9 0.002 2010-01-01 66.4 0.002 2011-01-01 11.9 0.002 2012-01-01 261.8 0.001 2013-01-01 135.1 0.002 2014-01-01 90.3 0.003 2015-01-01 47.0 0.002 2016-01-01 338.0 0.002 2017-01-01 188.0 0.001 2018-01-01 114.2 0.002 2019-01-01 73.7 0.002 2020-01-01 23.3 0.002 2021-01-01 289.7 0.001 2022-01-01 146.2 0.002 2023-01-01 97.0 0.003 2024-01-01 55.4 0.002 2025-01-01 353.2 0.002 2026-01-01 215.9 0.001 2027-01-01 122.1 0.002 2028-01-01 80.6 0.003 2029-01-01 33.7 0.002 2030-01-01 312.3 0.001 2031-01-01 160.0 0.002 2032-01-01 103.9 0.003 2033-01-01 63.2 0.002 2034-01-01 6.6 0.002 2035-01-01 248.3 0.001 2036-01-01 130.9 0.002 2037-01-01 87.4 0.003 2038-01-01 43.2 0.002 2039-01-01 330.9 0.002 2040-01-01 178.3 0.001 2041-01-01 111.0 0.002 2042-01-01 70.6 0.002 2043-01-01 18.6 0.002 2044-01-01 278.5 0.001 2045-01-01 141.1 0.002 2046-01-01 94.1 0.003 2047-01-01 51.9 0.002 2048-01-01 346.9 0.002 2049-01-01 203.1 0.001 2050-01-01 118.6 0.002

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. Measures: green=micrometric, blue=interferometric, purple=photographic