20210+1028 J 838

20^h 21^m 00.67^s +10° 28' 21.0" P.A. 119.00 sep 6.9 mag 12.50,12.60

Coord 2000	20210+1028	Discov num	J 838	Comp		Coord arcsec 2000	20 21 00.67 +10 28 21.0
Date first	1912	Date last	2018	Obs	35
Pa first	51	Pa last	118.5	P.A. Now (θ)	118.5°
Sep first	2.9	Sep last	6.882	Sep. Now (ρ)	6.882"
Mag pri	12.50	Mag sec	12.60	delta mag (ΔM)	0.1	Spectral class
Pri motion ra	-018	Sec motion ra	+040
Pri motion dec	-007	Sec motion dec	-026
Notes	N C (See Notes, Has orbit and linear solution)

rPM=1.279

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation	Delphinus		Tycho2	1078-00744-1		Gaia DR2	1753567320839173888		HD	357347
ADS	13734

ORBITAL ELEMENTS

Period (P)	239.84y	Periastron (T)	1967.51y	Semi-major axis (a)	7.451a
Eccentricity (e)	0.784	Inclination (i)	77.6°	Longitude of periastron (ω)	258.1°
Node (Ω)	103°	Notes	n	Reference	Ole2002b
Equinox	2000	Last observation	1995	Grade	5	(1=Definitive, 9=Indet.)

label	theta	rho
2000	113.9	5.925
2001	114.2	5.961
2002	114.5	5.995
2003	114.8	6.025
2004	115.1	6.052
2005	115.4	6.077
2006	115.7	6.099
2007	116.0	6.118
2008	116.3	6.135
2009	116.6	6.150
2010	116.9	6.163
2011	117.2	6.173
2012	117.5	6.181
2013	117.8	6.188
2014	118.1	6.192
2015	118.4	6.195
2016	118.7	6.195
2017	119.0	6.195
2018	119.3	6.192
2019	119.5	6.188
2020	119.8	6.182
2021	120.1	6.175
2022	120.4	6.167
2023	120.7	6.157
2024	121.0	6.145
2025	121.3	6.133
2026	121.6	6.119
2027	121.9	6.104
2028	122.2	6.088
2029	122.5	6.070
2030	122.8	6.052

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

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

WDS 20210+1028 J 838 : NOTES

discov_num	notes	refcode
J 838	Pair is 4s after BD+10 4257.	J__1948
	Linear solution first suggested and alternative linear solution in	Cve2022
	Despite having an orbit, an optical pair based on parallax.	Mlk2022

REFERENCES

refcode	metd	author	reference
Cve2022	orb -	Cvetkovic, Z. & Pavlovic, R.	2022AJ....164...98C
Cve2022		AJ 164, 98, 2022
J__1948	Ma j	Jonckheere, R.	1948JO.....31...65J
J__1948		J. Obs. 31, 65, 1948
Mlk2022	not -	Chulkov, D. & Malkov, O.	2022MNRAS.517.2925C
Mlk2022		MNRAS 517, 2925, 2022
Ole2002b	orb -	Olevic, D.	2002IAUDS.146....2O
Ole2002b		Inf. Circ. 146, 2, 2002

DISCOVERER

idgroup	discov	author
1	J	Jonckheere, R.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20210+1028	J 838		2005	17	118	6.3	11.52	12.00		OD	202100.67+102821.0
20210+1028	J 838		2009	19	117	6.3	11.52	12.00		OD	202100.67+102821.0
20210+1028	J 838		2010	20	118	6.4	11.52	12.00		OD	202100.67+102821.0
20210+1028	J 838		2011	22	118	6.5	11.52	12.00		NOD	202100.67+102821.0
20210+1028	J 838		2013	23	118	6.6	12.50	12.60		NO	202100.67+102821.0
20210+1028	J 838		2015	24	119	6.7	12.50	12.60		NO	202100.67+102821.0
20210+1028	J 838		2016	27	119	6.8	12.50	12.60		NO	202100.67+102821.0
20210+1028	J 838		2018	32	119	6.9	12.50	12.60		NO	202100.67+102821.0

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

WDS 20210+1028 J 838 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20210+1028 J 838 : MEASURES

No records found.

WDS 20210+1028 : VIRTUAL EYEPIECE

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WDS 20210+1028 : ALADIN DSS IMAGE @ 20^h 21^m 00.67^s +10° 28' 21.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20210+1028 J 838 : 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		20210+1028	J 838		119	6.9
Show		20210+1033	TOR 24		229	1.7	5
Show		20203+1036	TOR 23		236	8.2	14
Show		20221+0959	TDT2210		69	0.5	34
Show		20224+0959	TDS1065		22	1.3	36
Show		20189+1006	GRV 328		59	23.2	38
Show		20207+0946	GRV 332		282	23.1	42
Show		20201+1109	A 1206		269	3.2	43
Show		20232+0957	TDT2229		227	1.2	45
Show		20186+1100	STF2662		42	2.0	48
Show		20236+1059	GWP2943		132	13.2	50
Show		20221+1117	BPM2131		352	23.0	51
Show		20189+1113	HJ 1498		218	17.4	55
Show		20239+1107	BPM2142		53	34.9	59
Show		20250+1016	HJ 1509		180	19.2	60
Show		20202+1128	HDS2906		319	0.6	62
Show		20231+0935	DAM 213			8.5	62
Show		20242+1113	ENG 74	AB	73	67.8	65
Show		20242+1113	ENG 74	AC	97	160.4	65
Show		20242+1113	ENG 74	BC	112	102.0	66
Show		20230+0929	J 2572		280	4.0	68
Show		20250+1108	BPM2146		49	87.4	71
Show		20249+1124	J 840		52	3.7	79
Show		20260+1102	BPM2156	AB	73	53.8	82
Show		20254+0938	VKI 37		103	2.8	82
Show		20157+1003	J 135		323	3.6	83
Show		20260+1102	BPM2157	BC	109	117.7	83
Show		20157+0957	J 1234		43	4.4	85
Show		20264+1103	BPM2159	AB	65	36.6	88
Show		20264+1103	BPM2160	AC	152	67.7	88
Show		20269+1013	TDT2282		258	3.1	89
Show		20263+1109	UC 4181		356	86.7	89
Show		20245+0916	HJ 2959		262	7.4	89
Show		20270+1008	J 1343		53	2.3	91
Show		20228+1156	BPM2135		218	90.0	92
Show		20151+1000	GWP2931		50	29.0	92
Show		20166+1138	BPM2084		198	88.2	96
Show		20198+1203	J 837		296	2.0	97
Show		20271+0948	J 559		295	2.0	99
Show		20265+0931	UC 4185		277	7.7	100
Show		20270+1116	HJ 268		248	20.5	100
Show		20279+0958	AG 256	AB	351	5.2	107
Show		20279+0958	AG 256	AC	225	99.2	107
Show		20146+1116	J 1296		237	3.3	109
Show		20211+0837	HJ 2953		260	26.3	112
Show		20259+0902	J 3084		87	6.0	113
Show		20153+1145	BPM2078		109	18.7	114
Show		20151+1143	J 604		235	0.6	115
Show		20266+1148	BPM2161		343	104.2	115
Show		20133+1047	A 1202		125	0.8	115
Show		20289+1022	J 3263		54	7.1	116

WDS 20210+1028 : COMPONENTS

	A
B	pa=118.9° sep=6.79"

20210+1028 A

Componente originario normalizzato	AB		Coord arcsec 2000	202100.67+102821.0		Mag	12.5		PmRA	-18.00
PmDE	-7.0

20210+1028 B

Componente originario normalizzato	AB		Coord arcsec 2000	202101.07+102817.7		Mag	12.6		PmRA	40.00
PmDE	-26.0		Calc delta mag	0.1		Calc coord	yes