19535+2405 DJU   4 (13 Vul)

Coord 2000	19535+2405		Discov num	DJU   4		Comp			Coord arcsec 2000	19 53 27.69 +24 04 46.6
Date first	1953		Date last	2012		Obs	48
Pa first	242		Pa last	245		P.A. Now (θ)	246.9°
Sep first	0.8		Sep last	1.4		Sep. Now (ρ)	1.38"
Mag pri	4.63		Mag sec	7.37		delta mag (ΔM)	2.74		Spectral class	B9.5III (blue-white)
Pri motion ra	+020		Sec motion ra	+020
Pri motion dec	+033		Sec motion dec	+033
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	244.6		Precise sep	1.409		Name	13 Vul		Constellation	Vulpecula
SAO	87883		HIP	97886		Tycho2	2140-03051-1		Gaia DR2	61117254272
HD	188260		HR	7592		GC	27544		BD	BD+23 3820
Flamsteed	13 Vulpeculae		Flamsteed name	13 Vul		Distance	102.56		Distance ly	334.55
last precise pa	244.6		last precise sep	1.409

Period (P)	615.25y	± 104.12	Periastron (T)	2027.82y	± 94.79	Semi-major axis (a)	1.555a	± 0.241
Eccentricity (e)	0.079	± 0.042	Inclination (i)	85.9°	± 1.5	Longitude of periastron (ω)	169.7°	± 4.4
Node (Ω)	68.1°	± 0.3	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2004

label rho theta 2000 1.254 245.8 2001 1.262 245.9 2002 1.270 245.9 2003 1.277 246.0 2004 1.285 246.0 2005 1.292 246.1 2006 1.299 246.2 2007 1.306 246.2 2008 1.313 246.3 2009 1.319 246.3 2010 1.326 246.4 2011 1.332 246.5 2012 1.338 246.5 2013 1.344 246.6 2014 1.349 246.6 2015 1.355 246.7 2016 1.360 246.7 2017 1.365 246.8 2018 1.370 246.8 2019 1.375 246.9 2020 1.380 247.0 2021 1.384 247.0 2022 1.388 247.1 2023 1.392 247.1 2024 1.396 247.2 2025 1.400 247.2 2026 1.403 247.3 2027 1.407 247.3 2028 1.410 247.4 2029 1.413 247.4 2030 1.415 247.5 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19535+2405	DJU 4		2004	42	246	1.3	4.63	7.37	B9.5III	NOD	195327.69+240446.6
19535+2405	DJU 4		2007	43	246	1.3	4.63	7.37	B9.5III	NOD	195327.69+240446.6
19535+2405	DJU 4		2009	44	245	1.4	4.63	7.37	B9.5III	NOD	195327.69+240446.6
19535+2405	DJU 4		2011	46	245	1.4	4.63	7.37	B9.5III	NO	195327.69+240446.6
19535+2405	DJU 4		2012	48	245	1.4	4.63	7.37	B9.5III	NO	195327.69+240446.6

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