16175+7545 LDS 1844 (Eta UMi)

16^h 17^m 30.28^s +75° 45' 19.1" P.A. 125.00 sep 228.3 mag 4.96,15.31 Sp F5V dist. 29.74 pc (97.01 l.y.)

Coord 2000	16175+7545	Discov num	LDS1844	Comp		Coord arcsec 2000	16 17 30.28 +75 45 19.1
Date first	1966	Date last	2015	Obs	18
Pa first	125	Pa last	124.9	P.A. Now (θ)	124.9°
Sep first	227.0	Sep last	228.322	Sep. Now (ρ)	228.322"
Mag pri	4.96	Mag sec	15.31	delta mag (ΔM)	10.35	Spectral class	F5V (yellow-white)
Pri motion ra	-090	Sec motion ra	-083
Pri motion dec	+258	Sec motion dec	+257
Notes	N V (See Notes, Proper motion indicates physical)

rPM=0.026 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	Eta UMi	Constellation	Ursa Minor	SAO	8470	HIP	79822
Tycho2	4567-01764-1	Gaia DR2	1704062466923822336	HD	148048	HR	6116
GC	21999	GL	NN 3950A	BD	BD+76 596	Bayer	Eta Ursae Minoris
Bayer name	Eta UMi	Flamsteed	21 Ursae Minoris	Flamsteed name	21 UMi	FK5	612
Distance	29.74	Distance ly	97.01	Bayer greek	η UMi

WDS 16175+7545 LDS 1844 (Eta UMi) : NOTES

discov_num	notes	refcode
LDS1844	eta UMi = 21 UMi

REFERENCES

refcode	metd	author	reference
LDS		Luyten p.m. catalog (from additional DD list)	...................

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
16175+7545	LDS1844		1999	2	125	228.1	4.96	15.31	F5V	N DV	161730.50+754516.9
16175+7545	LDS1844		2004	3	125	228.4	4.96	15.31	F5V	NVD	161730.50+754516.9
16175+7545	LDS1844		2010	4	125	228.3	4.96	15.31	F5V	NV	161730.28+754519.1
16175+7545	LDS1844		2015	16	125	228.1	4.96	15.31	F5V	NV	161730.28+754519.1

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WDS 16175+7545 LDS 1844 (Eta UMi) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 16175+7545 LDS 1844 (Eta UMi) : MEASURES

No records found.

WDS 16175+7545 (Eta UMi) : VIRTUAL EYEPIECE

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WDS 16175+7545 (Eta UMi) : ALADIN DSS IMAGE @ 16^h 17^m 30.28^s +75° 45' 19.1"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 16175+7545 LDS 1844 (Eta UMi) : 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		16175+7545	LDS1844		125	228.3
Show		16216+7620	STF2066		56	5.3	38
Show		16133+7620	MFL 224		136	8.8	39
Show		16065+7547	HU 916	AB	168	0.5	41
Show		16065+7547	LDS1838	AB,C	167	62.0	41
Show		16282+7614	MLR 350		226	1.1	49
Show		16165+7457	KPP3413	AC	255	4.3	49
Show		16263+7629	STF2077		308	17.4	55
Show		16126+7642	UC 3136		136	16.3	60
Show		16342+7559	ACG 1		290	5.7	63
Show		16181+7651	UC 3150		320	15.4	66
Show		16006+7523	TDS9724		329	1.3	68
Show		16000+7615	STF2020	AB	244	26.6	71
Show		16196+7434	GII 41		27	2.7	72
Show		16213+7434	HDS2310		104	0.2	73
Show		16365+7618	MFL 241		70	20.0	77
Show		15587+7628	LDS1833		117	3.6	81
Show		16227+7708	SKF2776		285	4.9	85
Show		16269+7411	LDS1846		40	16.3	101
Show		16172+7734	CAB 23	AB	315	21.3	109
Show		16172+7734	RAO 601	Aa,Ab	263	0.8	109
Show		16343+7419	LDS1849		286	169.2	109
Show		15588+7425	LDS1832		61	183.7	110
Show		16218+7734	MFL 235		165	7.3	110
Show		16002+7417	LDS1835		243	17.9	111
Show		15586+7726	UC 3095		207	29.5	120
Show		16132+7339	MLR 196		235	0.7	128
Show		16003+7356	MLR 349		312	8.3	129
Show		16356+7343	LDS1850		101	234.1	141
Show		16319+7759	MFL 216		11	5.3	143
Show		16256+7325	TDS9892		198	0.6	145
Show		16292+7805	FAR 48	AB	19	0.4	145
Show		16292+7805	FAR 48	Ba,Bb	200	0.0	145
Show		16004+7331	MLR 195		297	1.1	151
Show		16126+7315	LDS1840		36	5.7	152
Show		16181+7257	LDS1843		117	15.3	168
Show		15586+7822	MFL 170		357	7.5	169
Show		16310+7304	NSN 679		338	2.0	171
Show		16097+7837	MFL 222		21	6.1	174
Show		16108+7840	MFL 261		260	4.6	176
Show		16046+7254	TDS9749		191	2.2	180
Show		16271+7844	TDS9908		191	0.6	182
Show		16324+7847	KPP2334		231	19.9	188
Show		16363+7247	TDS9998		336	0.5	194
Show		16090+7234	STF2036	AB	238	2.2	195
Show		16090+7234	HJ 3345	AC	166	14.3	195
Show		16035+7237	SKF2726		149	4.9	197
Show		16315+7237	HDS2334		175	1.1	197
Show		16359+7912	BVD 328		350	55.7	216
Show		16304+7930	MLR 351		91	3.6	229
Show		16339+7159	HDS2342		265	0.3	237

WDS 16175+7545 : COMPONENTS

	A
B	pa=160.6° sep=138.54"

16175+7545 A

Componente originario normalizzato	AB	Name	Eta UMi	Coord arcsec 2000	161730.28+754519.1	Mag	4.96
Spectral class	F5V (yellow-white)	PmRA	-90.00	PmDE	258.0	SAO	8470
HIP	79822	Tycho2	4567-01764-1	HD	148048	HR	6116
GC	21999	BD	BD+76 596	Bayer	Eta Ursae Minoris	Bayer name	Eta
Flamsteed	21 Ursae Minoris	Flamsteed name	21 UMi	FK5	612

Tycho2

Tycho2	4567-01764-1	Pflag		RAmdeg	244.37620882	DEmdeg	75.75532538
PmRA	-89.1	PmDE	256.0	E RAmdeg	3	E DEmdeg	3
E pmRA	0.6	E pmDE	0.6	EpRAm	1991.26	EpDEm	1991.24
Num	18	Q RAmdeg	1.0	Q DEmdeg	1.0	Q pmRA	1.0
Q pmDE	1.0	BTmag	5.378	E BTmag	0.014	VTmag	4.991
E VTmag	0.009	Prox	999	TYC	T	HIP	79822
CCDM		RAdeg	244.37704194	DEdeg	75.75473028	EpRA 1990	1.72
EpDE 1990	1.63	E RAdeg	3.4	E DEdeg	3.3	Posflg
Corr	0.1

SAO

SAO	8470	DelFlag		RA1950		PmRA1950	-0.0232
DE1950		PmDE1950	0.25	Vmag	5	SpType	F0
Double code		Source	74	CatNum	612	DM	BD+76 596
DMcomp		BDsup		HD	148048	M HD	0
GC	21999	RA1950rad	4.2714234	DE1950rad	1.32420379	PmRA2000	-0.0224
PmDE2000	0.25

Hipparcos

Catalog	H	HIP	79822	Proxy		RAhms	16 17 30.50
DEdms	+75 45 16.9	Vmag	4.95	VarFlag		R Vmag	H
RAdeg	244.377	DEdeg	75.7547	AstroRef		Plx	33.52
CCDM	16176+7545	N CCDM	I	Nsys	1	Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	148048	BD	BD+76 596
CD		CP		Dm number	+76 596	VIred	0.44
SpType	F5V	R SpType		Coord arcsec 2000	161730.50+754516.9

Hipparcos 2

HIP	79822	Sn	5	So	0	Nc	1
RArad	4.2651847957	DErad	1.3221690065	Plx	33.63	PmRA	-90.3
PmDE	257.66	E RArad	0.16	E DErad	0.17	E Plx	0.17
E pmRA	0.19	E pmDE	0.2	Hpmag	5.0409	E Hpmag	0.0006
SHp	0.004	VA	0	BV	0.393	E BV	0.002
VI	0.46

16175+7545 B

Componente originario normalizzato	AB		Coord arcsec 2000	161742.76+754308.5		Mag	15.31		PmRA	-83.00
PmDE	257.0		Calc delta mag	10.35		Calc coord	yes