19264+4928 YSC 134 (HD 183255)

19^h 26^m 25.98^s +49° 27' 55.1" P.A. 50.00 sep 0.0 mag 8.40,9.40 Sp K2V+K4.5V dist. 25.01 pc (81.58 l.y.)

Coord 2000	19264+4928	Discov num	YSC 134	Comp		Coord arcsec 2000	19 26 25.98 +49 27 55.1
Date first	2008	Date last	2015	Obs	15
Pa first	202	Pa last	49.6	P.A. Now (θ)	49.6°
Sep first	0.0	Sep last	0.024	Sep. Now (ρ)	0.024"
Mag pri	8.40	Mag sec	9.40	delta mag (ΔM)	1	Spectral class	K2V+K4.5V (yellow-orange/yellow-orange)
Pri motion ra	+457	Sec motion ra
Pri motion dec	+714	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 183255	Constellation	Cygnus	HIP	95575	Tycho2	3551-01452-1
HD	183255	GL	GJ 1237	BD	BD+49 3009	Distance	25.01
Distance ly	81.58

ORBITAL ELEMENTS

Period (P)	0.45678y	± 0.000008	Periastron (T)	2012.44y	± 0.000257	Semi-major axis (a)	0.0273a	± 0.0005
Eccentricity (e)	0.13698	± 0.00031	Inclination (i)	136°	± 1	Longitude of periastron (ω)	243.2°	± 0.016
Node (Ω)	23.5°	± 1	Notes	n		Reference	Doc2018h
Equinox	2000		Last observation	2015		Grade	2	(1=Definitive, 9=Indet.)

label	theta	rho
2000	231.8	0.025
2001	170.7	0.021
2002	65.3	0.021
2003	12.1	0.029
2004	321.0	0.024
2005	249.2	0.024
2006	191.0	0.024
2007	92.3	0.018
2008	24.4	0.028
2009	338.1	0.026
2010	268.9	0.022
2011	207.7	0.025
2012	126.3	0.017
2013	38.0	0.026
2014	352.7	0.027
2015	290.2	0.022
2016	223.4	0.025
2017	157.7	0.019
2018	54.6	0.023
2019	5.7	0.029
2020	311.0	0.023
2021	240.0	0.024
2022	181.2	0.023
2023	77.2	0.020
2024	18.0	0.029
2025	329.6	0.024
2026	258.5	0.023
2027	199.3	0.025
2028	108.3	0.017
2029	30.7	0.028
2030	345.4	0.027

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

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 19264+4928 YSC 134 (HD 183255) : NOTES

discov_num	notes	refcode
YSC 134	Metal-poor SB2, spectroscopic orbit published by Tokovinin (1991).	Tok1991
	An astrometric orbit was deduced from Hipparcos data by Jancart et al.	Jnc2005
	(2005). The period derived for the visual orbit matches both the
	spectroscopic and astrometric solutions within the uncertainty, and
	other orbital parametrs are in reasonable agreement with the Tokovinin
	solution. The updated Hipparcos parallax (39.98 +/- 0.73 mas),
	combined with the orbit, yields a mass sum of 2.0 +/- 0.3 Msun. The
	composite spectral type is K3V; a magnitude difference of 0.8 mags
	makes the component spectral types roughly K1V + K4V, which suggests
	a mass sum of 1.2-1.5 Msun, accounting for the lower metallicity.	Hor2012b
	For the Horch et al. (2015) combined solution, spectroscopic elements
	are fixed to those of Halbwachs et al. (2012). Assigned spectral	HJL2012
	types are K2V and K4.5V; derived masses 0.74 and 0.68 Msun.	Hor2015
	Orbital parallax is 42.01 +/- 1.08 mas. Mass of the primary is
	0.695 +/- 0.066 \msun. Mass of the secondary is 0.621 +/- 0.058 \msun.	Doc2018h

REFERENCES

refcode	metd	author	reference
Doc2018h	orb -	Docobo, J.A., Campo, P.P., Gomez, J. & Horch, E.P.	2018AJ....156..185D
Doc2018h	+not	AJ 156, 185, 2018
HJL2012	orb -	Halbwachs, J.L., Arenou, F., Famaey, B., et al.	.
HJL2012		SF2A-2012: Proc. Annual Meeting of the French Society of Astronomy & Astrophysics
HJL2012		87, ed. S. Boissier et al. (Paris: Soc. Francaise d'Astron. et d'Astrop.)
Hor2012b	S j	Horch, E.P., Howell, S.B., Everett, M.E., & Ciardi, D.R.	2012AJ....144..165H
Hor2012b	+orb	AJ 144, 165, 2012
Hor2015	S j	Horch, E.P., van Altena, W.F., Demargue, P., Howell, S.B., Everett, M.E.,	2015AJ....149..151H
Hor2015	+orb	Ciardi, D.R., Teske, J.K., Henry, T.J., & Winters, J.G.
Hor2015		AJ 149, 151, 2015
Jnc2005	orb -	Jancart, S., Jorrisen, A., Babusiaux, C., & Pourbaix, D.	2005A&A...442..365J
Jnc2005		A&A 442, 365, 2005
Tok1991	orb -	Tokovinin, A.A.	1991A&AS...91..497T
Tok1991		A&AS 91, 497, 1991

DISCOVERER

idgroup	discov	author
1	YSC	Yale-Southern Connecticut (from additional DD list - see HOR)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19264+4928	YSC 134		2010	2	51	0.0	8.40	9.40	K3V	D	192625.57+492748.9
19264+4928	YSC 134		2012	5	200	0.0	8.40	9.40	K3V	D	192625.57+492748.9
19264+4928	YSC 134		2014	11	272	0.0	8.40	9.40	K2V K4.5V	NO	192625.57+492748.9
19264+4928	YSC 134		2015	15	50	0.0	8.40	9.40	K2V+K4.5V	NO	192625.98+492755.1

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WDS 19264+4928 YSC 134 (HD 183255) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 19264+4928 YSC 134 (HD 183255) : MEASURES

No records found.

WDS 19264+4928 (HD 183255) : VIRTUAL EYEPIECE

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Pass over with the mouse cursor to display the catalog designation.

WDS 19264+4928 (HD 183255) : ALADIN DSS IMAGE @ 19^h 26^m 25.98^s +49° 27' 55.1"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 19264+4928 YSC 134 (HD 183255) : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		19264+4928	YSC 134		50	0.0
Show		19267+4926	COU2628		98	1.1	3
Show		19256+4935	DEA 493		222	189.4	11
Show		19252+4915	KOI7443		318	3.4	18
Show		19251+4915	KOI2454		336	1.6	19
Show		19245+4921	DEA 322		271	15.7	20
Show		19263+4950	TDT1458		344	0.6	22
Show		19283+4914	KOI2143		317	2.2	24
Show		19285+4915	KOI2482		212	0.3	24
Show		19238+4922	KOI2705		304	1.9	27
Show		19287+4912	KOI3015	AB	227	4.9	28
Show		19289+4942	KOI7469		179	3.2	28
Show		19240+4914	KOI4823		153	1.3	28
Show		19238+4912	KOI1428		170	2.6	30
Show		19293+4939	KOI1424		59	2.8	31
Show		19281+4901	KOI1857		11	0.2	32
Show		19287+4905	HJ 1408		235	7.2	33
Show		19241+4902	KOI 246		148	10.0	35
Show		19299+4931	BU 143		192	2.2	35
Show		19296+4910	KOI5889	AB	246	0.8	36
Show		19296+4910	KOI5889	AC	208	3.4	36
Show		19300+4920	KOI2771	AB	312	3.9	36
Show		19303+4932	ES 1097		244	1.1	38
Show		19275+5005	ES 1096		159	6.9	39
Show		19253+4850	DEA 108		231	6.4	40
Show		19304+4939	DEA 450		355	31.4	41
Show		19272+4848	CTI3474		326	10.6	41
Show		19268+5009	STTA182	AB	297	73.3	41
Show		19268+5009	STTA182	AC	163	14.3	41
Show		19268+5009	STTA182	AD	157	36.4	41
Show		19301+4904	KOI1802		240	5.4	44
Show		19220+4914	DEA 400		2	20.4	45
Show		19303+4955	KOI1531		99	0.4	47
Show		19225+4900	KOI3346			2.8	48
Show		19258+5016	TDT1450		152	6.3	49
Show		19310+4908	DEA 242		299	10.5	50
Show		19222+4957	KOI3892		339	0.1	50
Show		19246+5014	BAG 33		18	0.0	50
Show		19242+5014	KOI4729		165	3.3	51
Show		19236+4845	KOI4896	AB	76	3.5	52
Show		19236+4845	KOI4896	AC	179	3.5	52
Show		19236+4844	DEA 424		116	23.4	52
Show		19248+4838	TDT1439		206	0.8	53
Show		19317+4921	DEA 140		15	7.5	53
Show		19241+5016	KOI1462		299	3.5	53
Show		19217+4859	KOI7426		212	2.4	55
Show		19238+5016	KOI4475		140	1.8	55
Show		19278+4834	KOI7403		275	3.0	56
Show		19309+4851	KOI 977		350	0.3	58
Show		19276+5025	TDS 994		162	1.0	59
Show		19217+5007	JKA 53		354	26.8	60

WDS 19264+4928 : COMPONENTS

	A
B	pa=37.4° sep=0.02"

19264+4928 A

Componente originario normalizzato	AB	Name	HD 183255	Coord arcsec 2000	192625.98+492755.1	Mag	8.4
Spectral class	K2V (yellow-orange)	PmRA	457.00	PmDE	714.0	HIP	95575
Tycho2	3551-01452-1	HD	183255	BD	BD+49 3009

Tycho2

Tycho2	3551-01452-1	Pflag		RAmdeg	291.60826472	DEmdeg	49.46530948
PmRA	456.7	PmDE	713.0	E RAmdeg	7	E DEmdeg	6
E pmRA	1.3	E pmDE	1.3	EpRAm	1990.96	EpDEm	1991.29
Num	9	Q RAmdeg	0.3	Q DEmdeg	1.2	Q pmRA	0.3
Q pmDE	1.2	BTmag	9.235	E BTmag	0.019	VTmag	8.146
E VTmag	0.012	Prox	999	TYC	T	HIP	95575
CCDM		RAdeg	291.60660167	DEdeg	49.46364778	EpRA 1990	1.48
EpDE 1990	1.61	E RAdeg	7.3	E DEdeg	6.3	Posflg
Corr	0.1

Hipparcos

Catalog	H	HIP	95575	Proxy		RAhms	19 26 25.57
DEdms	+49 27 48.9	Vmag	8.01	VarFlag		R Vmag	H
RAdeg	291.607	DEdeg	49.4636	AstroRef		Plx	39.73
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag	X	Source		Qual		M HIP
Theta		Rho		HD	183255	BD	BD+49 3009
CD		CP		Dm number	+49 3009	VIred	0.97
SpType	K3V	R SpType		Coord arcsec 2000	192625.57+492748.9

Hipparcos 2

HIP	95575	Sn	5	So	2	Nc	1
RArad	5.0894945494	DErad	0.8633022531	Plx	39.98	PmRA	457.1
PmDE	713.96	E RArad	0.68	E DErad	0.61	E Plx	0.73
E pmRA	0.82	E pmDE	0.77	Hpmag	8.1541	E Hpmag	0.0013
SHp	0.013	VA	0	BV	0.929	E BV	0.009
VI	0.97

19264+4928 B

Componente originario normalizzato	AB		Coord arcsec 2000	192625.98+492755.1		Mag	9.4		Spectral class	K4.5V (yellow-orange)
Calc delta mag	1		Calc coord	yes