21174+4020 SEI 1492

21^h 17^m 20.74^s +40° 19' 56.8" P.A. 246.00 sep 24.6 mag 11.46,12.52

Coord 2000	21174+4020	Discov num	SEI1492	Comp		Coord arcsec 2000	21 17 20.74 +40 19 56.8
Date first	1895	Date last	2015	Obs	12
Pa first	245	Pa last	246.2	P.A. Now (θ)	246.2°
Sep first	25.3	Sep last	24.643	Sep. Now (ρ)	24.643"
Mag pri	11.46	Mag sec	12.52	delta mag (ΔM)	1.06	Spectral class
Pri motion ra	-007	Sec motion ra	-004
Pri motion dec	-007	Sec motion dec	-004
Notes

rPM=0.429

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3173-03032-1

Gaia DR2

1965635733426915712

WDS 21174+4020 SEI 1492 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Sei1908	Pa -	Scheiner, J.	1908POPot..59.....S
Sei1908	+Po	Pub. Obs. Potsdam 20, #59, 1908
Sei1913A	Pa -	Scheiner, J.	1913QB811.B8.......
Sei1913A		cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Sei1932A	Pa -	Scheiner, J.	1932QB821.A43......
Sei1932A		cited in ADS (Aitken Double Star Cat.), 1932

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21174+4020	SEI1492		1998	6	246	24.8	11.46	12.50		D	211720.74+401956.8
21174+4020	SEI1492		2002	7	246	24.7	11.46	12.50		D	211720.74+401956.8
21174+4020	SEI1492		2010	8	246	24.6	11.46	12.52			211720.74+401956.8
21174+4020	SEI1492		2015	9	246	24.6	11.46	12.52			211720.74+401956.8

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WDS 21174+4020 SEI 1492 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21174+4020 SEI 1492 : MEASURES

No records found.

WDS 21174+4020 : VIRTUAL EYEPIECE

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WDS 21174+4020 : ALADIN DSS IMAGE @ 21^h 17^m 20.74^s +40° 19' 56.8"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21174+4020 SEI 1492 : 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		21174+4020	SEI1492		246	24.6
Show		21170+4020	SEI1487		238	21.2	5
Show		21176+4023	LDS2505		23	4.3	5
Show		21168+4019	TOB 219		212	35.0	7
Show		21169+4009	COU1972		145	0.2	12
Show		21180+4003	LDS2506		161	14.1	18
Show		21171+4002	GRV 443		333	16.6	18
Show		21171+4001	A 1441	AB	273	0.2	19
Show		21171+4001	SEI1489	AC	102	16.4	19
Show		21192+4026	LDS2508	AB	357	7.8	22
Show		21165+3959	SEI1484		7	4.2	23
Show		21153+4017	A 1440		213	1.2	24
Show		21165+4046	ES 1690		101	3.8	29
Show		21175+3950	SEI1493		142	24.1	30
Show		21191+3954	SEI1502		274	13.1	33
Show		21204+4017	RAO 451		116	2.8	36
Show		21176+3945	STF2785		234	2.9	36
Show		21145+4036	COU2227		193	1.2	38
Show		21199+3957	SEI1506		60	7.8	38
Show		21195+4048	TDT2903		9	0.4	38
Show		21184+3943	SEI1497		213	10.0	39
Show		21190+3945	STT 434	AB	122	24.4	40
Show		21190+3945	ARY 5	AC	317	97.2	40
Show		21196+3948	SEI1503	AB	278	9.7	41
Show		21196+3948	SEI1504	AC	66	22.5	41
Show		21196+3948	ABH 143	AD	119	104.7	41
Show		21196+3948	ABH 143	AE	161	54.4	41
Show		21196+3948	ABH 143	AF	229	50.9	41
Show		21196+3948	ABH 143	AG	45	111.9	41
Show		21196+3948	ABH 143	AH	66	86.5	41
Show		21196+3948	ABH 143	AI	74	124.3	41
Show		21191+3944	SEI1501		240	29.7	42
Show		21209+4010	UC 259	AB	110	55.0	42
Show		21199+3948	SEI1507		146	11.6	44
Show		21161+4101	COU2229		278	0.8	44
Show		21172+3936	SEI1490	AB	95	20.1	44
Show		21172+3936	LDS2504	BC	67	23.5	44
Show		21139+4042	TDT2840		235	0.7	45
Show		21209+4002	LDS2512		30	85.1	45
Show		21146+3947	LDS2500		355	14.5	46
Show		21189+4102	HO 601	AB	176	17.1	47
Show		21189+4102	HO 601	AC	82	56.7	47
Show		21192+4102	HO 602		27	4.2	47
Show		21212+4003	COU2230		81	0.4	49
Show		21140+4051	KPP1300		32	9.9	50
Show		21164+4110	ES 1689		136	3.3	51
Show		21181+3929	MLB 895		182	5.7	51
Show		21184+3930	SEI1496		352	19.5	52
Show		21215+4002	SEI1511		283	28.5	52
Show		21193+4108	TDT2901		306	0.5	53
Show		21129+4033	ES 256		281	4.5	54

WDS 21174+4020 : COMPONENTS

	A
B	pa=239.9° sep=19.86"

21174+4020 A

Componente originario normalizzato	AB		Coord arcsec 2000	211720.74+401956.8		Mag	11.46		PmRA	-7.00
PmDE	-7.0		Tycho2	3173-03032-1

Tycho2

Tycho2	3173-03032-1	Pflag		RAmdeg	319.33641668	DEmdeg	40.33243779
PmRA	-6.4	PmDE	-7.4	E RAmdeg	46	E DEmdeg	39
E pmRA	1.7	E pmDE	1.6	EpRAm	1982.86	EpDEm	1984.52
Num	4	Q RAmdeg	0.6	Q DEmdeg	0.2	Q pmRA	0.6
Q pmDE	0.2	BTmag	11.590	E BTmag	0.061	VTmag	11.456
E VTmag	0.088	Prox	247	TYC	T	HIP
CCDM		RAdeg	319.33643528	DEdeg	40.33245472	EpRA 1990	1.61
EpDE 1990	1.68	E RAdeg	48.4	E DEdeg	40.5	Posflg
Corr	0.0

21174+4020 B

Componente originario normalizzato	AB		Coord arcsec 2000	211719.24+401946.9		Mag	12.52		PmRA	-4.00
PmDE	-4.0		Tycho2	3173-01096-1		Calc delta mag	1.06		Calc coord	yes

Tycho2

Tycho2	3173-01096-1	Pflag		RAmdeg	319.32824601	DEmdeg	40.32960635
PmRA	-0.6	PmDE	-7.2	E RAmdeg	81	E DEmdeg	73
E pmRA	2.1	E pmDE	2.0	EpRAm	1970.85	EpDEm	1972.00
Num	4	Q RAmdeg	0.7	Q DEmdeg	1.8	Q pmRA	0.7
Q pmDE	1.8	BTmag	12.628	E BTmag	0.192	VTmag	12.503
E VTmag	0.193	Prox	247	TYC		HIP
CCDM		RAdeg	319.32824500	DEdeg	40.32962056	EpRA 1990	1.62
EpDE 1990	1.65	E RAdeg	93.4	E DEdeg	82.8	Posflg
Corr	0.0