18201-0936 MOC 14 AB

Coord 2000	18201-0936		Discov num	MOC  14		Comp	AB		Coord arcsec 2000	18 20 03.93 -09 35 44.6
Date first	2015		Date last	2015		Obs	1
Pa first	269		Pa last	269		P.A. Now (θ)	269°
Sep first	1.2		Sep last	1.15		Sep. Now (ρ)	1.15"
Mag pri	5.21		Mag sec	15.00		delta mag (ΔM)	9.79		Spectral class	G6V (yellow)
Pri motion ra	-092		Sec motion ra
Pri motion dec	-224		Sec motion dec
Notes	N U K (See Notes, Proper motion indicates non-physical, 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 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			18 20 04 -09 35 45	MOC 14 AB	2015	1	269	1.2	5.21	15.00	9.79	Y	<===
Show			18 20 04 -09 35 45	MOC 14 AC	2015	1	214	2.1	5.21	17.20	11.99
Show			18 20 04 -09 35 45	MOC 14 AD	2015	1	95	2.2	5.21	16.60	11.39

Quadruple system
4 estimated visually detectable stars in this system

Constellation	Serpens		HIP	89844		Tycho2	5681-01576-1		Gaia DR2	4157584215800708736
HD	168443		GL	NN 4052		BD	BD-09 4692		Distance	37.43
Distance ly	122.1

Identifier	18201-0936 GJ 4052
coord_arcsec_2000	182003.93-093544.6

Period (P)	1748.2d (4.79y)	± 1	Periastron (T)	53769.8d (2006.093y)	± 0	Semi-major axis (a)	2.4m	± 0.6
Eccentricity (e)	0.212	± 0.001	Inclination (i)	35.7°	± 12.9	Longitude of periastron (ω)	64.7°	± 0.5
Node (Ω)	139.1°	± 34.1	Notes	n		Reference	SaJ2011
Equinox			Last observation			Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 88.7 0.002 2001-01-01 163.5 0.002 2002-01-01 284.0 0.002 2003-01-01 342.9 0.003 2004-01-01 36.6 0.002 2005-01-01 103.2 0.002 2006-01-01 187.0 0.002 2007-01-01 300.2 0.002 2008-01-01 353.3 0.003 2009-01-01 50.2 0.002 2010-01-01 117.9 0.002 2011-01-01 215.5 0.002 2012-01-01 313.5 0.002 2013-01-01 4.2 0.003 2014-01-01 64.3 0.002 2015-01-01 133.2 0.002 2016-01-01 245.2 0.002 2017-01-01 325.0 0.003 2018-01-01 15.6 0.002 2019-01-01 78.8 0.002 2020-01-01 150.2 0.002 2021-01-01 270.3 0.002 2022-01-01 335.7 0.003 2023-01-01 27.8 0.002 2024-01-01 93.3 0.002 2025-01-01 170.4 0.002 2026-01-01 289.6 0.002 2027-01-01 346.2 0.003 2028-01-01 40.9 0.002 2029-01-01 107.8 0.002 2030-01-01 195.6 0.002		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic