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20375+1436
BU 151 AB
Rotanev

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20375+1436 BU 151 AB (Rotanev)

20^h 37^m 32.87^s +14° 35' 42.7" P.A. 218.00 sep 0.2 mag 4.11,5.02 Sp F5IV+F2V dist. 30.93 pc (100.89 l.y.)

Coord 2000	20375+1436	Discov num	BU 151	Comp	AB	Coord arcsec 2000	20 37 32.87 +14 35 42.7
Date first	1873	Date last	2018	Obs	734
Pa first	355	Pa last	217.9	P.A. Now (θ)	315.4°
Sep first	0.7	Sep last	0.224	Sep. Now (ρ)	0.313"
Mag pri	4.11	Mag sec	5.02	delta mag (ΔM)	0.91	Spectral class	F5IV+F2V (yellow-white/yellow-white)
Pri motion ra	+118	Sec motion ra
Pri motion dec	-048	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

20375+1436 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Rotanev	106316	20 37 33 +14 35 43	BU 151 AB	2018	734	218	0.2	4.11	5.02	0.91	Y	<===
Show		106316	20 37 33 +14 35 43	HJ 5545 AB,C	2011	32	139	12.1	3.68	13.50	9.82
Show	Bet Del	106316	20 37 33 +14 35 43	STF 2704 AB,D	2014	60	317	47.8	3.68	11.40	7.72
Show		106316	20 37 33 +14 35 43	LBZ 1 AB,E	2014	9	271	112.6	3.68	11.63	7.95

Quintuple system
6 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Rotanev	Constellation	Delphinus	SAO	106316	HIP	101769
Tycho2	1100-01720-1	Gaia DR2	1810448909926616448	HD	196524	HR	7882
GC	28709	ADS	14073	BD	BD+14 4369	Bayer	Beta Delphini
Bayer name	Bet Del	Flamsteed	6 Delphini	Flamsteed name	6 Del	Distance	30.93
Distance ly	100.89	Bayer greek	β Del

Other names

Rotanen

Meaning

'Venator' in reverse

ORBITAL ELEMENTS

Period (P)	9745.8d (26.68y)	± 1.4	Periastron (T)	37961.5m (1962.812y)	± 4	Semi-major axis (a)	0.43701a	± 0.00016
Eccentricity (e)	0.35595	± 0.00069	Inclination (i)	61.323°	± 0.03	Longitude of periastron (ω)	168.86°	± 0.13
Node (Ω)	357.179°	± 0.029	Notes	n		Reference	Mut2010e
Equinox	2000		Last observation	2008		Grade	1	(1=Definitive, 9=Indet.)

label	theta	rho
2000	341.1	0.512
2001	345.2	0.547
2002	348.9	0.571
2003	352.3	0.586
2004	355.7	0.589
2005	359.0	0.581
2006	2.6	0.561
2007	6.5	0.529
2008	10.9	0.486
2009	16.4	0.431
2010	23.7	0.366
2011	34.5	0.293
2012	52.3	0.222
2013	83.4	0.173
2014	122.6	0.181
2015	150.9	0.229
2016	169.1	0.273
2017	183.7	0.282
2018	199.4	0.257
2019	220.0	0.218
2020	248.2	0.193
2021	278.2	0.207
2022	300.7	0.253
2023	315.4	0.313
2024	325.2	0.375
2025	332.4	0.432
2026	337.9	0.482
2027	342.4	0.524
2028	346.4	0.556
2029	350.0	0.577
2030	353.4	0.588

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

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

SUSPECTED ORBITAL ELEMENTS

SUSPECTED ORBITAL ELEMENTS SOLUTION #1

Identifier	20375+1436 BU 151 B
coord_arcsec_2000	203732.87+143542.7

Period (P)	201.9d	± 1.1	Periastron (T)	53013.5m (2004.023y)	± 7.8	Semi-major axis (a)	0.217m	± 0.057
Eccentricity (e)	0.67	± 0.24	Inclination (i)	84.3°	± 3.4	Longitude of periastron (ω)	230°	± 23
Node (Ω)	124.2°	± 3.9	Notes	n		Reference	Mut2010e
Equinox	2000		Last observation	2008		Grade	9	(1=Definitive, 9=Indet.)

label	theta	rho
2000-01-01	142.9
2001-01-01	131.7
2002-01-01	128.0
2003-01-01	124.6
2004-01-01	301.2
2005-01-01	153.8
2006-01-01	133.0
2007-01-01	128.8
2008-01-01	125.6
2009-01-01	313.4
2010-01-01	194.0
2011-01-01	134.8
2012-01-01	129.5
2013-01-01	126.4
2014-01-01	118.5
2015-01-01	269.7
2016-01-01	137.3
2017-01-01	130.4
2018-01-01	127.1
2019-01-01	122.7
2020-01-01	291.3
2021-01-01	141.5
2022-01-01	131.4
2023-01-01	127.9
2024-01-01	124.3
2025-01-01	299.7
2026-01-01	150.2
2027-01-01	132.7
2028-01-01	128.6
2029-01-01	125.3
2030-01-01	307.9

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

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

SUSPECTED ORBITAL ELEMENTS

SUSPECTED ORBITAL ELEMENTS SOLUTION #2

Identifier	20375+1436 BU 151 B
coord_arcsec_2000	203732.87+143542.7

Period (P)	435.3d	± 5.6	Periastron (T)	52941m (2003.825y)	± 20	Semi-major axis (a)	0.221m	± 0.04
Eccentricity (e)	0		Inclination (i)	87.2°	± 4.6	Longitude of periastron (ω)	0°
Node (Ω)	128.3°	± 4	Notes	n		Reference	Mut2010e
Equinox	2000		Last observation	2008		Grade	9	(1=Definitive, 9=Indet.)

label	theta	rho
2000-01-01	117.7
2001-01-01	311.3
2002-01-01	307.7
2003-01-01	301.0
2004-01-01	132.0
2005-01-01	128.1
2006-01-01	122.8
2007-01-01	313.0
2008-01-01	308.4
2009-01-01	304.0
2010-01-01	134.3
2011-01-01	128.7
2012-01-01	124.9
2013-01-01	316.6
2014-01-01	309.0
2015-01-01	305.6
2016-01-01	140.8
2017-01-01	129.3
2018-01-01	126.1
2019-01-01	332.4
2020-01-01	309.7
2021-01-01	306.5
2022-01-01	217.5
2023-01-01	130.0
2024-01-01	126.9
2025-01-01	103.9
2026-01-01	310.5
2027-01-01	307.3
2028-01-01	295.7
2029-01-01	131.0
2030-01-01	127.6

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

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

WDS 20375+1436 BU 151 AB (Rotanev) : NOTES

discov_num	notes	refcode
BU 151	bet Del = 6 Del = Rotanev.	Mlr1955c
	1975.545, 1975.956: The elements quoted by Finsen (1938) and	Fin1938a
	Couteau (1962) each give theta and rho greater than those	Cou1962e
	observed.	BLM1978
	Primary is a giant, according to isochrone fit.	Sod1999
	Two AO photometric analyses by ten Brummelaar et al. both include	TtB1996b
	mass determination and spectral typing.	TtB2000
HJ 5545	AB,C: Optical pair, based on study of relative motion of the
	components using the method of apparent motion parameters.	Kiy2008
STF2704	AB,D: Optical pair, based on study of relative motion of the
	components using the method of apparent motion parameters.	Kiy2008
	AB,D: H 4 35.	MEv2010
HJ 5545	AB,C: Rectilinear solution by Hurowitz et al. (2014).	USN2014b
STF2704	AB,D: Rectilinear solution by Friedman et al. (2012).	USN2012a

REFERENCES

refcode	metd	author	reference
BLM1978	S j	Morgan, B.L., Beddoes, D.R., Scaddan, R.J. & Dainty, J.C.	1978MNRAS.183..701M
BLM1978		MNRAS 183, 701, 1978
Cou1962e	orb -	Couteau, P.	1962JO.....45...37C
Cou1962e		J. Obs. 45, 37, 1962
Fin1938a	orb -	Finsen, W.S.	1938CiUO...99..445F
Fin1938a		Union Obs. Johannesburg Circ. 99, 445-463, 1938
Kiy2008	-	Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S.	2008SvAL...32..405K
Kiy2008		SvAL 34, 405, 2008
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlr1955c	Mc -	Muller, P.	1955JO.....38..221M
Mlr1955c		J. Obs. 38, 221, 1955
Mut2010e	Kp -	Muterspaugh, M.W., Lane, B.F., Kulkarni, S.R., Konacki, M., Burke, B.F.,	2010AJ....140.1657M
Mut2010e	+orb	Colavita, M.M., Shao, M., Hartkopf, W., Boss, A.P., & Williamson, M.
Mut2010e		AJ 140, 1657, 2010
Sod1999	orb -	Soderhjelm, S.	1999A&A...341..121S
Sod1999		A&A 341, 121, 1999
TtB1996b	A -	ten Brummelaar, T.A., Mason, B.D., Bagnuolo, W.G., Jr., Hartkopf, W.,	1996AJ....112.1180T
TtB1996b		McAlister, H.A., & Turner, N.H.
TtB1996b		AJ 112, 1180, 1996
TtB2000	Ac j	ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,	2000AJ....119.2403T
TtB2000		Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000		AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)
USN2012a	lin -	Friedman, E.A., Mason, B.D., & Hartkopf, W.I.	2012IAUDS.176....1F
USN2012a		Inf. Circ. 176, 1, 2012
USN2014b	lin -	Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D.	2014IAUDS.183....1H
USN2014b		Inf. Circ. 183, 1, 2014

DISCOVERER

idgroup	discov	author
1	BU	Burnham, S.W. (BU 1 - 81)
179	HJ	Herschel, J.F.W.
228	LBZ	Labitzke, P.
231	STF	Struve, F.G.W.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20375+1436	BU 151	AB	2007	643	9	0.6	4.11	5.02	F5IV+F2V	NOD	203732.87+143542.7
20375+1436	BU 151	AB	2008	648	14	0.5	4.11	5.02	F5IV+F2V	NOD	203732.87+143542.7
20375+1436	BU 151	AB	2009	652	24	0.4	4.11	5.02	F5IV+F2V	NOD	203732.87+143542.7
20375+1436	BU 151	AB	2012	730	72	0.2	4.11	5.02	F5IV F2V	NOD	203732.87+143542.7
20375+1436	BU 151	AB	2016	727	189	0.3	4.11	5.02	F5IV+F2V	NO	203732.87+143542.7
20375+1436	BU 151	AB	2018	733	218	0.2	4.11	5.02	F5IV+F2V	NO	203732.87+143542.7

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

WDS 20375+1436 BU 151 AB (Rotanev) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20375+1436 BU 151 AB (Rotanev) : MEASURES

No records found.

WDS 20375+1436 (Rotanev) : VIRTUAL EYEPIECE

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

WDS 20375+1436 (Rotanev) : ALADIN DSS IMAGE @ 20^h 37^m 32.87^s +14° 35' 42.7"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20375+1436 BU 151 AB (Rotanev) : NEIGHBORHOODS

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show	Rotanev	20375+1436	BU 151	AB	218	0.2	1
Show		20375+1436	HJ 5545	AB,C	139	12.1	1
Show		20375+1436	STF2704	AB,D	317	47.8	1
Show		20375+1436	LBZ 1	AB,E	271	112.6	1
Show		20372+1425	HEI9015		14	4.6	12
Show		20368+1444	STF2703	AB	290	25.1	14
Show		20368+1444	STF2703	AD	347	84.7	14
Show		20368+1444	STF2703	AC	234	77.8	14
Show		20368+1444	STF2703	BC	215	67.0	14
Show		20366+1437	A 1679		273	3.1	14
Show		20370+1420	J 3098		302	4.9	17
Show		20391+1448	LEP 95		151	8.5	26
Show		20388+1500	BU 435		119	3.1	31
Show		20353+1440	DRS 32		143	13.5	33
Show		20351+1439	BPM2197	AB	327	17.3	36
Show		20351+1439	BPM2198	BC	11	114.9	37
Show		20397+1415	UC 4247		147	32.7	38
Show		20352+1457	SKF1767		246	1.5	40
Show		20390+1400	BPM2217		287	65.7	42
Show		20351+1413	J 1887		278	5.4	43
Show		20397+1406	J 3104		286	6.2	44
Show		20346+1423	BPM2194		77	81.0	45
Show		20402+1503	UC 4251		291	52.0	48
Show		20357+1522	ARY 85		321	83.6	54
Show		20391+1526	BPM2219		170	85.3	56
Show		20379+1338	KPP2532		26	22.8	59
Show		20364+1339	BPM2206		91	38.2	59
Show		20413+1458	NSN 4		71	4.6	59
Show		20393+1529	HEI 77		41	1.4	62
Show		20419+1419	HU 1199		249	0.7	66
Show		20351+1533	J 566		119	4.1	67
Show		20363+1328	BPM2203	AB	231	51.2	71
Show		20363+1328	BPM2204	AC	356	69.3	71
Show		20418+1404	J 2575		305	1.7	71
Show		20391+1329	TDT2453	Aa,Ab	117	0.5	71
Show		20391+1329	UC 4242	AB	105	45.3	71
Show		20334+1359	J 3093		44	4.3	71
Show		20427+1440	BPM2233		190	72.4	76
Show		20406+1539	HDS2947		111	0.2	77
Show		20329+1357	L 35	CD	130	0.5	78
Show		20329+1357	BU 670	AB	5	0.8	78
Show		20329+1357	A 3108	AB,CD	340	98.4	78
Show		20391+1550	BU 288	AB	154	5.2	78
Show		20391+1550	BU 288	AC	122	39.9	78
Show		20391+1550	BU 288	AD	146	28.8	78
Show		20391+1550	BU 288	AE	33	23.3	78
Show		20366+1553	BPM2207		49	43.4	79
Show		20408+1332	GWP2982		31	88.8	80
Show		20342+1333	HEI 277		247	0.7	80
Show		20375+1557	BPM2214		90	69.1	82
Show		20320+1416	HJL 282		189	74.8	83

WDS 20375+1436 : COMPONENTS

	A	B	C	D
B	pa=217.0° sep=0.22"
C	pa=139.6° sep=11.94"	pa=138.6° sep=11.89"
D	pa=317.5° sep=47.11"	pa=317.8° sep=47.15"	pa=318.0° sep=59.04"
E	pa=271.2° sep=108.98"	pa=271.3° sep=108.85"	pa=275.6° sep=117.25"	pa=247.2° sep=83.67"

20375+1436 A

Common name	Rotanev	Meaning	'Venator' in reverse	Other names	Rotanen	Coord arcsec 2000	203732.87+143542.7
Mag	4.11	Spectral class	F5IV (yellow-white)	PmRA	118.00	PmDE	-48.0
SAO	106316	HIP	101769	Tycho2	1100-01720-1	HD	196524
HR	7882	GC	28709	BD	BD+14 4369	Bayer	Beta Delphini
Bayer name	Bet Del	Flamsteed	6 Delphini	Flamsteed name	6 Del

Tycho2

Tycho2	1100-01720-1	Pflag		RAmdeg	309.38723308	DEmdeg	14.59511021
PmRA	109.9	PmDE	-37.2	E RAmdeg	3	E DEmdeg	3
E pmRA	0.6	E pmDE	0.6	EpRAm	1991.33	EpDEm	1991.08
Num	18	Q RAmdeg	1.3	Q DEmdeg	1.3	Q pmRA	1.3
Q pmDE	1.3	BTmag	4.152	E BTmag	0.014	VTmag	3.677
E VTmag	0.009	Prox	999	TYC	T	HIP	101769
CCDM	AB	RAdeg	309.38697167	DEdeg	14.59519833	EpRA 1990	1.71
EpDE 1990	1.46	E RAdeg	3.2	E DEdeg	3.3	Posflg	P
Corr	-0.2

SAO

SAO	106316	DelFlag		RA1950		PmRA1950	0.0077
DE1950		PmDE1950	-0.031	Vmag	3.7	SpType	F5
Double code		Source	71	CatNum	771	DM	BD+14 4369
DMcomp		BDsup		HD	196524	M HD	0
GC	28709	RA1950rad	5.38959169	DE1950rad	0.251678	PmRA2000	0.0078
PmDE2000	-0.033

Hipparcos

Catalog	H	HIP	101769	Proxy	H	RAhms	20 37 32.87
DEdms	+14 35 42.7	Vmag	3.64	VarFlag		R Vmag	G
RAdeg	309.387	DEdeg	14.5952	AstroRef	*	Plx	33.49
CCDM	20375+1436	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	205	Rho	0.24	HD	196524	BD	BD+14 4369
CD		CP		Dm number	+14 4369	VIred	0.5
SpType	F5IV	R SpType		Coord arcsec 2000	203732.87+143542.7

Hipparcos 2

HIP	101769	Sn	57	So	3	Nc	2
RArad	5.3998210942	DErad	0.2547343921	Plx	32.33	PmRA	118.09
PmDE	-48.06	E RArad	0.41	E DErad	0.33	E Plx	0.47
E pmRA	0.47	E pmDE	0.43	Hpmag	3.723	E Hpmag	0.0006
SHp	0.004	VA	0	BV	0.425	E BV	0.015
VI	0.5

CCDM

Ccdm	20375+1436	RComp		Comp	A	Note1
Note2		Discov num		DRAs	2.92	DDEs	-17.8
R dRAs	10	Year		Theta		Rho
Obs	5	Vmag	4.1	Sp	F5	PmNote	*
PmRA	108	PmDE	-35	Dm number	+14 4369	Cat1	BD
Name2		Cat2		HD	196524	M HD
ADS BDS	A14073	M ADS BDS		N IDS		IDS	20328N1415A
HIC	101769

20375+1436 B

Coord arcsec 2000	203732.86+143542.5		Mag	5.02		Spectral class	F2V (yellow-white)		Calc delta mag	0.91
Calc coord	yes

CCDM

Ccdm	20375+1436	RComp		Comp	B	Note1	*
Note2		Discov num	BU 151	DRAs		DDEs
R dRAs		Year	1873	Theta		Rho
Obs	99	Vmag	5.1	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14073	M ADS BDS		N IDS		IDS	20328N1415B
HIC	101769

20375+1436 C

Coord arcsec 2000	203733.40+143533.6		Mag	13.5		Spectral class	G0 (yellow)		PmRA	-8.00
PmDE	-24.0		Calc delta mag	9.39		Calc coord	yes

CCDM

Ccdm	20375+1436	RComp		Comp	C	Note1
Note2		Discov num	HJ	DRAs		DDEs
R dRAs		Year	1924	Theta	121	Rho	22.8
Obs	13	Vmag	13.1	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14073	M ADS BDS		N IDS		IDS	20328N1415C
HIC

20375+1436 D

Coord arcsec 2000	203730.68+143617.5		Mag	11.4		PmRA	-14.00		PmDE	-16.0
Calc delta mag	7.29		Calc coord	yes

CCDM

Ccdm	20375+1436	RComp		Comp	D	Note1
Note2		Discov num	STF2704	DRAs		DDEs
R dRAs		Year	1931	Theta	327	Rho	39.1
Obs	99	Vmag	11.0	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14073	M ADS BDS		N IDS		IDS	20328N1415D
HIC

20375+1436 E

Coord arcsec 2000	203725.36+143545.1		Mag	11.63		PmRA	4.00		PmDE	-12.0
Calc delta mag	7.52		Calc coord	yes

CCDM

Ccdm	20375+1436	RComp		Comp	E	Note1
Note2		Discov num	LBZ	DRAs		DDEs
R dRAs		Year	1960	Theta	271	Rho	106.5
Obs	2	Vmag		Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14073	M ADS BDS		N IDS		IDS	20328N1415E
HIC