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Doubles in session


Current system
15292+8027
STF 1972 AB
Pi1 UMi


Nearby doubles
8' : 15309+8020
MFL 195

10' : 15288+8037
HAU 23

38' : 15325+8103
STF1980

38' : 15386+7958
LDS1827

39' : 15396+7959
STF1989

43' : 15355+8106
TDS9554AB

49' : 15365+7943
TDS9560

50' : 15149+8102
TDS9464

63' : 15434+8119
A 856AB

69' : 15198+7923
MFL 197

81' : 15326+7907
KPP3292

83' : 15446+8142
MFL 167

109' : 15118+7849
MFL 188

111' : 15144+8213
UC 2967

114' : 15223+7835
KPP 342

134' : 15178+7817
TDS9472

138' : 15281+8245
MFL 166

168' : 15364+8313
MLR 348

170' : 15479+7746
STF1997

174' : 15476+8316
STF2002

183' : 15356+7726
LDS1825AB

193' : 15476+7722
MFL 186

195' : 15487+8337
STF2034

197' : 15282+7710
MFL 147

200' : 15195+7710
SKF1235

201' : 15202+7708
LDS1819



Selections
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Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

15292+8027 STF 1972 AB (Pi1 UMi)

 
 
15h 29m 11.19s +80° 26' 55.0" P.A. 79.00 sep 31.6 mag 6.64,7.30 Sp G1.5V+G9V dist. 21.85 pc (71.27 l.y.)
 
 
Coord 2000 15292+8027 Discov num STF1972 Comp AB Coord arcsec 2000 15 29 11.19 +80 26 55.0
Date first 1782 Date last 2018 Obs 107
Pa first 87 Pa last 78.9 P.A. Now (θ) 78.9°
Sep first 26.4 Sep last 31.63 Sep. Now (ρ) 31.63"
Mag pri 6.64 Mag sec 7.30 delta mag (ΔM) 0.66 Spectral class G1.5V+G9V (yellow/yellow)
Pri motion ra -225 Sec motion ra -217
Pri motion dec +108 Sec motion dec +106
Notes N T (See Notes, Parallax indicates physical)
rPM=0.033 (< 0.3, Physical double)
This double is physical.
 
 
15292+8027 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Pi1 UMi 2556 15 29 11 +80 26 55 STF 1972 AB 2018 107 79 31.6 6.64 7.30 0.66 <===
Show 2556 15 29 11 +80 26 55 STF 1972 AC 2020 9 101 188.1 6.64 11.40 4.76
Show 2558 15 29 24 +80 27 01 LAF 54 BD 2005 1 271 6.9 5.60 20.10 14.50
Show 2558 15 29 24 +80 27 01 LAF 54 BE 2005 1 272 7.4 5.60 20.30 14.70
Quintuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Pi1 UMi Constellation Ursa Minor SAO 2556 HIP 75809
Tycho2 4566-01950-1 Gaia DR2 1720995598827435648 HD 139777 HR 5829
GC 20929 ADS 9696 BD BD+80 480 Bayer Pi 1 Ursae Minoris
Bayer name Pi1 UMi Distance 21.85 Distance ly 71.27 Bayer greek π1 UMi
 
 
WDS 15292+8027 STF 1972 AB (Pi1 UMi) : NOTES
 
 
discov_num notes refcode
STF1972 LDS1823. A is a spectroscopic binary. Composite spectrum:
G0IV-V+G8IV-V. B is BD+80@481, and is also a spectroscopic binary.
AB: NLTT 40576/40590 Chm2004
AB: HJL 224. HJL1986
AB: H 4 90. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
Chm2004 E - Chaname, J. & Gould, A. 2004ApJ...601..289C
Chm2004 ApJ 601, 289, 2004
Chm2004 (Photometry, coordinates, and astrometry from rNLTT. Astrometry from early
Chm2004 versions of 2MASS and UCAC, with date given only as "circa 2000". Measures
Chm2004 identical to discovery observations - predominantly close pairs - were assumed
Chm2004 not new observations, so not included in WDS. Similar concerns when primary and
Chm2004 secondary magnitudes or proper motions were the same.)
HJL1986 Pa - Halbwachs, J.L. 1986A&AS...66..131H
HJL1986 A&AS 66, 131, 1986
HJL1986 (Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added
HJL1986 only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113)
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
 
 
DISCOVERER
 
 
discov author
CHM Chaname, J. & Gould, A.
HJL Halbwachs, J.L., Boffin, H.M.J., Le Bouquin, J.-B., Kiefer, F., Famaey, B.,
HJL Salomon, J.-B., Arenou, F., Pourbaix, D., Anthonioz, F., Grellmann, R., Guieu, S.,
HJL Sana, H., et al.
HJL Halbwachs, J.-L., Kiefer, F., Lebreton, Y., Boffin, H.M.J., Arenou, F., LeBouquin,
LAF Lafreniere, D., Doyon, R., Marois, C., Nadeau, D., Oppenheimer, B.R., Roche, P.F.,
LAF Rigaut, F., Graham, J.R., et al.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr dm_number notes coord_arcsec_2000
15292+8027 STF1972 AB 2007 76 79 31.3 6.64 7.30 +80 480 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2008 77 79 31.3 6.64 7.30 +80 480 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2010 79 79 31.4 6.64 7.30 +80 480 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2013 88 79 31.4 6.64 7.30 G0IV-V +80 480 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2015 90 78 31.8 6.64 7.30 G0IV-V +80 480 NZ V 152911.19+802655.0
15292+8027 STF1972 AB 2016 96 81 31.8 6.64 7.30 G0IV-V +80 480 NZ V 152911.19+802655.0
15292+8027 STF1972 AB 2017 97 80 31.8 6.64 7.30 G0IV-V +80 480 NZ V 152911.19+802655.0
15292+8027 STF1972 AB 2018 99 80 31.6 6.64 7.30 G0IV-V +80 480 NZ V 152911.19+802655.0

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

 
 
WDS 15292+8027 STF 1972 AB (Pi1 UMi) : VISUAL OBSERVATIONS REPORTS
 
 
Show date username difficulty separation pa_estim interest notes
Show 25/05/12 daedalus1 mean difficulty separated 79   Rather widely separated. Both stars are yellow-white. Primary much brighter.
Show 23/11/25 Diego Vercelli very easy separated 80 interesting

 
 
WDS 15292+8027 STF 1972 AB (Pi1 UMi) : MEASURES
 
 
Records found: 1
Show date username difficulty sep sep_sigma pa pa_sigma delta_mag # notes
Show 25/05/12 daedalus1 mean difficulty 31.96 0.04 79.00 0.00 0.66 12 Seeing: Pickering 6, good.
 
 
WDS 15292+8027 (Pi1 UMi) : VIRTUAL EYEPIECE
 
 

15292+8027 STF1972A mag 6.64 Sp G1.5V 15292+8027 LAF 54B sep 31.4 P.A. 79.20 mag 5.6 Sp G9V 15292+8027 STF1972C sep 188.2 P.A. 100.80 mag 11.4 15292+8027 LAF 54D sep 24.7 P.A. 75.80 mag 20.1 15292+8027 LAF 54E sep 24.3 P.A. 75.20 mag 20.3 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 15292+8027 (Pi1 UMi) : ALADIN DSS IMAGE @ 15h 29m 11.19s +80° 26' 55.0"
 
 
 
 
WDS 15292+8027 STF 1972 AB (Pi1 UMi) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

15292+8027 STF1972AB distance=1' 15292+8027 STF1972AC distance=1' 15292+8027 LAF 54BD distance=1' 15292+8027 LAF 54BE distance=1' 15309+8020 MFL 195 distance=8' 15288+8037 HAU 23 distance=10' 15325+8103 STF1980 distance=38' 15386+7958 LDS1827 distance=38' 15396+7959 STF1989 distance=39' 15355+8106 TDS9554AB distance=43' 15365+7943 TDS9560 distance=49' 15149+8102 TDS9464 distance=50' 15434+8119 A 856AB distance=63' 15434+8119 A 856AC distance=63' 15198+7923 MFL 197 distance=69' 15326+7907 KPP3292 distance=81' 15446+8142 MFL 167 distance=83' 15118+7849 MFL 188 distance=109' 15144+8213 UC 2967 distance=111' 15490+8209 MFL 185AC distance=112' 15223+7835 KPP 342 distance=114' 15178+7817 TDS9472 distance=134' 15281+8245 MFL 166 distance=138' 15364+8313 MLR 348 distance=168' 15479+7746 STF1997 distance=170' 15476+8316 STF2002 distance=174' 15356+7726 LDS1825AB distance=183' 15356+7726 WIS 288AC distance=183' 15476+7722 MFL 186 distance=193' 15487+8337 STF2034 distance=195' 15282+7710 MFL 147 distance=197' 15195+7710 SKF1235 distance=200' 15202+7708 LDS1819 distance=201' 15266+7701 LDS1821 distance=205' 15325+7646 HU 911 distance=221' 15103+7648 LDS1812 distance=226' 15434+7643 MFL 172 distance=228' 15340+7632 LDS1824 distance=236' 15479+7636 MFL 183 distance=238' 15189+7626 MFL 198 distance=243' 15258+8430 MLR 347 distance=244' 15231+7620 MFL 148 distance=248' 15123+8446 TDS9444 distance=261' 15399+7606 MFL 171 distance=264' 15143+8452 TDS 771 distance=267' 15403+7601 HEI 787 distance=268' 15413+7600 CAC 24 distance=270' 15229+8457 MLR 345 distance=271' grafico limitrofi
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 15292+8027 STF1972 AB 79 31.6 1
Show 15292+8027 STF1972 AC 101 188.1 1
Show 15292+8027 LAF 54 BD 271 6.9 1
Show 15292+8027 LAF 54 BE 272 7.4 1
Show 15309+8020 MFL 195 348 9.6 8
Show 15288+8037 HAU 23 65 34.9 10
Show 15325+8103 STF1980 48 10.2 38
Show 15386+7958 LDS1827 45 6.0 38
Show 15396+7959 STF1989 21 0.6 39
Show 15355+8106 TDS9554 AB 23 1.1 43
Show 15365+7943 TDS9560 17 1.0 49
Show 15149+8102 TDS9464 59 0.5 50
Show 15434+8119 A 856 AB 345 5.2 63
Show 15434+8119 A 856 AC 341 64.4 63
Show 15198+7923 MFL 197 94 5.4 69
Show 15326+7907 KPP3292 183 3.0 81
Show 15446+8142 MFL 167 237 9.7 83
Show 15118+7849 MFL 188 60 8.7 109
Show 15144+8213 UC 2967 207 47.9 111
Show 15490+8209 MFL 185 AC 336 15.5 112
Show 15223+7835 KPP 342 323 3.7 114
Show 15178+7817 TDS9472 95 1.1 134
Show 15281+8245 MFL 166 115 7.6 138
Show 15364+8313 MLR 348 117 0.6 168
Show 15479+7746 STF1997 339 18.3 170
Show 15476+8316 STF2002 312 42.2 174
Show 15356+7726 LDS1825 AB 280 182.4 183
Show 15356+7726 WIS 288 AC 318 999.9 183
Show 15476+7722 MFL 186 248 6.1 193
Show 15487+8337 STF2034 109 1.1 195
Show 15282+7710 MFL 147 147 59.7 197
Show 15195+7710 SKF1235 159 7.1 200
Show 15202+7708 LDS1819 226 11.8 201
Show 15266+7701 LDS1821 72 4.5 205
Show 15325+7646 HU 911 268 1.6 221
Show 15103+7648 LDS1812 160 90.2 226
Show 15434+7643 MFL 172 317 5.7 228
Show 15340+7632 LDS1824 180 1.9 236
Show 15479+7636 MFL 183 259 31.9 238
Show 15189+7626 MFL 198 237 11.0 243
Show 15258+8430 MLR 347 214 0.2 244
Show 15231+7620 MFL 148 143 60.0 248
Show 15123+8446 TDS9444 350 0.4 261
Show 15399+7606 MFL 171 132 4.1 264
Show 15143+8452 TDS 771 226 1.1 267
Show 15403+7601 HEI 787 255 2.9 268
Show 15413+7600 CAC 24 210 0.4 270
Show 15229+8457 MLR 345 229 0.8 271

 
 
WDS 15292+8027 : COMPONENTS
 
 
  A B C D
B pa=79.2°
sep=31.37"
 
C pa=100.8°
sep=188.20"
pa=105.0°
sep=159.43"
 
D pa=75.8°
sep=24.72"
pa=271.3°
sep=6.85"
pa=284.4°
sep=166.10"
 
E pa=75.2°
sep=24.26"
pa=272.2°
sep=7.36"
pa=284.4°
sep=166.62"
pa=284.1°
sep=0.52"
 
 
15292+8027 A
 
 
Name Pi1 UMi Coord arcsec 2000 152911.19+802655.0 Mag 6.64 Spectral class G1.5V (yellow)
PmRA -225.00 PmDE 108.0 Tycho2 4566-01950-1
Tycho2
Tycho2 4566-01950-1 Pflag RAmdeg 232.29666362 DEmdeg 80.44860457
PmRA -223.2 PmDE 107.8 E RAmdeg 4 E DEmdeg 4
E pmRA 1.2 E pmDE 1.2 EpRAm 1991.52 EpDEm 1991.48
Num 11 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.7
Q pmDE 0.7 BTmag 7.367 E BTmag 0.015 VTmag 6.643
E VTmag 0.010 Prox 313 TYC T HIP 75809
CCDM RAdeg 232.29975694 DEdeg 80.44835444 EpRA 1990 1.72
EpDE 1990 1.65 E RAdeg 4.1 E DEdeg 4.2 Posflg
Corr 0.0
 
 
15292+8027 B
 
 
Coord arcsec 2000 152923.57+802700.9 Coord calc 152923.57+802700.9 Mag 5.6 Spectral class G9V (yellow)
PmRA -217.00 PmDE 106.0 Delta magnitude 1.04
 
 
15292+8027 C
 
 
Coord arcsec 2000 153025.43+802619.8 Mag 11.4 Delta magnitude 4.76 Coordinate calculated yes
 
 
15292+8027 D
 
 
Coord arcsec 2000 152920.82+802701.1 Mag 20.1 SAO 45566 Delta magnitude 13.46
Coordinate calculated yes
SAO
SAO 45566 DelFlag RA1950 PmRA1950 0.0008
DE1950 PmDE1950 0 Vmag 9 SpType F8
Double code Source 3 CatNum 1115 DM BD+47 2229
DMcomp BDsup HD 138303 M HD 0
GC RA1950rad 4.04832782 DE1950rad 0.82072355 PmRA2000 0.0013
PmDE2000 0.003
 
 
15292+8027 E
 
 
Coord arcsec 2000 152920.61+802701.2 Mag 20.3 Delta magnitude 13.66 Coordinate calculated yes