18309+3840 STF2338AB

Coord 2000	18309+3840		Discov num	STF2338		Comp	AB		Coord arcsec 2000	18 30 54.75 +38 39 33.8
Date first	1828		Date last	2017		Obs	26
Pa first	302		Pa last	301		P.A. Now (θ)	301°
Sep first	10.0		Sep last	12.1		Sep. Now (ρ)	12.1"
Mag pri	9.30		Mag sec	11.20		delta mag (ΔM)	1.9		Spectral class	K2 (yellow-orange)
Pri motion ra	-011		Sec motion ra	+000
Pri motion dec	-007		Sec motion dec	-009
Notes	N (See Notes)

rPM=0.857 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		67056	18 30 55 +38 39 34	STF 2338 AB	2017	26	301	12.1	9.30	11.20	1.90		<===
Show		67056	18 30 55 +38 39 34	STF 2338 AC	2017	24	206	76.4	9.30	9.62	0.32
Show		67056	18 30 55 +38 39 34	STF 2338 AE	2017	13	154	51.7	9.30	13.00	3.70
Show		67056	18 30 52 +38 38 25	STF 2338 CD	2017	6	243	13.0	9.62	14.80	5.18
Show		67056	18 30 52 +38 38 25	STF 2338 CE	2017	11	69	60.7	9.62	13.00	3.38

Quintuple system
5 visible stars in this system

Precise pa	300.6		Precise sep	12.1		Constellation	Lyra		SAO	67056
Tycho2	3105-00683-1		Gaia DR2	2108423433003279360

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18309+3840	STF2338	AB	2006	16	301	12.2	9.90	11.20	K2	N D	183054.75+383933.8
18309+3840	STF2338	AB	2012	19	300	12.2	9.30	11.20	K2	N D	183054.75+383933.8
18309+3840	STF2338	AB	2013	20	300	12.1	9.30	11.20	K2	N D	183054.75+383933.8
18309+3840	STF2338	AB	2015	21	301	12.1	9.30	11.20	K2	N	183054.75+383933.8
18309+3840	STF2338	AB	2017	22	301	12.1	9.30	11.20	K2	N	183054.75+383933.8

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