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Doubles in session


Current system
12540+5558
BLM 2
Alioth


Nearby doubles
20' : 12556+5613
DAM 711AB

25' : 12561+5540
LDS3068

58' : 12541+5500
LDS3067

59' : 13008+5545
STI2293

62' : 12487+5640
TDS8534

62' : 13007+5622
BU 1082

62' : 12501+5506
GJ 3753AB

64' : 12478+5522
TDS8526

69' : 12484+5509
NSN 634

71' : 12556+5706
MLR 553

74' : 12483+5653
LDS2660

77' : 12584+5705
A 1604

77' : 13026+5625
KR 41

78' : 12538+5440
STI2291

87' : 13042+5615
MLR 554

87' : 13020+5654
HJ 2631

89' : 12591+5441
LDS3069

91' : 13048+5555
WOR 23

97' : 12426+5545
LDS3058

105' : 12417+5543
SHY 64AB

109' : 13069+5612
UC 2483

109' : 12569+5744
MLR 500AB

110' : 12599+5736
STI2292

111' : 12449+5718
LDS1336

112' : 12409+5545
SLW 756

113' : 12418+5645
BWL 33AB



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

12540+5558 BLM 2 (Alioth)

 
 
12h 54m 01.63s +55° 57' 35.4" P.A. 60.00 sep 0.1 mag 1.77, Sp A0p dist. 25.31 pc (82.56 l.y.)
 
 
Coord 2000 12540+5558 Discov num BLM   2 Comp Coord arcsec 2000 12 54 01.63 +55 57 35.4
Date first 1975 Date last 2002 Obs 2
Pa first 95 Pa last 59.9 P.A. Now (θ) 59.9°
Sep first 0.1 Sep last 0.11 Sep. Now (ρ) 0.11"
Mag pri 1.77 Mag sec delta mag (ΔM) Spectral class A0p (white)
Pri motion ra +112 Sec motion ra
Pri motion dec -006 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Alioth Constellation Ursa Major SAO 28553 HIP 62956
Tycho2 3845-01190-1 Gaia DR2 1576683529448755328 HD 112185 HR 4905
GC 17518 BD BD+56 1627 Bayer Epsilon Ursae Majoris Bayer name Eps UMa
Flamsteed 77 Ursae Majoris Flamsteed name 77 UMa FK5 483 Distance 25.31
Distance ly 82.56 Bayer greek ε UMa
Other names ALIATH
Meaning Goat
 
 
WDS 12540+5558 BLM 2 (Alioth) : NOTES
 
 
discov_num notes refcode
BLM 2 eps UMa = 77 UMa = Alioth.
An Alpha CVn-type variable and eclipsing system.
1975.383: Erroneously listed as HD 112815 in Morgan et al. (1978) BLM1978
notes.
The Yale Bright Star Catalogue cites this star as a spectroscopic Hof1982
variable with periods of 4.15 years and 0.95 days; the object is also
a photometric variable with period 5.09 days. This observation
presumably resolved the longer period system. BLM1978
 
 
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
Hof1982 - Hoffleit, D. & Jaschek, C. 1982bscf.book.....H
Hof1982 The Bright Star Catalogue, Fourth Revised Edition, 1982
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
12540+5558 BLM 2 1975 1 95 0.1 1.77   A0p N 125401.63+555735.4
12540+5558 BLM 2 2002 2 60 0.1 1.77   A0p N D 125401.63+555735.4

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

 
 
WDS 12540+5558 BLM 2 (Alioth) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 12540+5558 BLM 2 (Alioth) : MEASURES
 
 
No records found.

 
 
WDS 12540+5558 (Alioth) : VIRTUAL EYEPIECE
 
 

12540+5558 BLM 2A mag 1.77 Sp A0p 12540+5558 BLM 2B sep 0.1 P.A. 44.00 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 12540+5558 (Alioth) : ALADIN DSS IMAGE @ 12h 54m 01.63s +55° 57' 35.4"
 
 
 
 
WDS 12540+5558 BLM 2 (Alioth) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

12540+5558 BLM 2 (Alioth) distance=0' 12556+5613 DAM 711AB distance=20' 12556+5613 LDS1343BC distance=21' 12561+5540 LDS3068 distance=25' 12541+5500 LDS3067 distance=58' 13008+5545 STI2293 distance=59' 12487+5640 TDS8534 distance=62' 13007+5622 BU 1082 distance=62' 12501+5506 GJ 3753AB distance=62' 12501+5506 FAR 14AC distance=62' 12478+5522 TDS8526 distance=64' 12484+5509 NSN 634 distance=69' 12556+5706 MLR 553 distance=71' 12483+5653 LDS2660 distance=74' 12584+5705 A 1604 distance=77' 13026+5625 KR 41 distance=77' 12538+5440 STI2291 distance=78' 13042+5615 MLR 554 distance=87' 13020+5654 HJ 2631 distance=87' 12591+5441 LDS3069 distance=89' 13048+5555 WOR 23 distance=91' 12426+5545 LDS3058 distance=97' 12417+5543 SHY 64AB distance=105' 12417+5543 SHY 64AC distance=105' 12417+5543 SHY 64AD distance=105' 12417+5543 SHY 236AE distance=105' 13069+5612 UC 2483 distance=109' 12569+5744 MLR 500AB distance=109' 12569+5744 MLR 500AC distance=109' 12599+5736 STI2292 distance=110' 12449+5718 LDS1336 distance=111' 12409+5545 SLW 756 distance=112' 12418+5645 BWL 33AB distance=113' 12418+5645 BWL 33AC distance=113' 12418+5645 BWL 33AD distance=113' 12563+5406 STF1695AB distance=114' 12563+5406 STF1695AC distance=114' 12406+5629 MLB 169 distance=117' 13054+5452 UC 182 distance=117' 13004+5746 UC 2449 distance=121' 12581+5758 LDS1350 distance=125' 12519+5354 CVR1474 distance=125' 12402+5503 STI2290AB distance=130' 12574+5351 WIS 211 distance=131' 12574+5351 NSN 636Aa,Ab distance=131' 12395+5516 BOY 6 distance=131' 12550+5810 STF1691AB distance=133' 12550+5810 STF1691AC distance=133' 13048+5418 UC 2471 distance=137' 13077+5441 MLB 170 distance=140' 12546+5819 WIS 207 distance=142' 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 Alioth 12540+5558 BLM 2 60 0.1
Show 12556+5613 DAM 711 AB 47 60.3 20
Show 12556+5613 LDS1343 BC 207 5.9 21
Show 12561+5540 LDS3068 349 14.1 25
Show 12541+5500 LDS3067 278 10.8 58
Show 13008+5545 STI2293 115 9.6 59
Show 12487+5640 TDS8534 271 2.6 62
Show 13007+5622 BU 1082 141 0.7 62
Show 12501+5506 GJ 3753 AB 307 2.6 62
Show 12501+5506 FAR 14 AC 109 123.1 62
Show 12478+5522 TDS8526 23 0.6 64
Show 12484+5509 NSN 634 140 2.2 69
Show 12556+5706 MLR 553 188 0.5 71
Show 12483+5653 LDS2660 129 83.3 74
Show 12584+5705 A 1604 328 2.6 77
Show 13026+5625 KR 41 333 3.5 77
Show 12538+5440 STI2291 28 5.9 78
Show 13042+5615 MLR 554 145 0.6 87
Show 13020+5654 HJ 2631 253 34.4 87
Show 12591+5441 LDS3069 169 54.3 89
Show 13048+5555 WOR 23 163 2.0 91
Show 12426+5545 LDS3058 248 6.6 97
Show 12417+5543 SHY 64 AB 191 999.9 105
Show 12417+5543 SHY 64 AC 309 999.9 105
Show 12417+5543 SHY 64 AD 69 999.9 105
Show 12417+5543 SHY 236 AE 248 999.9 105
Show 13069+5612 UC 2483 344 9.9 109
Show 12569+5744 MLR 500 AB 254 0.1 109
Show 12569+5744 MLR 500 AC 272 9.6 109
Show 12599+5736 STI2292 72 12.9 110
Show 12449+5718 LDS1336 10 236.1 111
Show 12409+5545 SLW 756 117 10.1 112
Show 12418+5645 BWL 33 AB 8 9.0 113
Show 12418+5645 BWL 33 AC 239 12.4 113
Show 12418+5645 BWL 33 AD 241 22.8 113
Show 12563+5406 STF1695 AB 280 3.7 114
Show 12563+5406 STF1695 AC 139 131.7 114
Show 12406+5629 MLB 169 310 2.0 117
Show 13054+5452 UC 182 184 43.3 117
Show 13004+5746 UC 2449 142 10.9 121
Show 12581+5758 LDS1350 182 2.8 125
Show 12519+5354 CVR1474 295 4.0 125
Show 12402+5503 STI2290 AB 246 13.5 130
Show 12574+5351 WIS 211 200 419.2 131
Show 12574+5351 NSN 636 Aa,Ab 317 1.6 131
Show 12395+5516 BOY 6 7 0.2 131
Show 12550+5810 STF1691 AB 275 18.5 133
Show 12550+5810 STF1691 AC 84 130.3 133
Show 13048+5418 UC 2471 113 13.5 137
Show 13077+5441 MLB 170 272 3.7 140
Show 12546+5819 WIS 207 120 999.9 142

 
 
WDS 12540+5558 : COMPONENTS
 
 
  A
B pa=44.0°
sep=0.08"
 
 
12540+5558 A
 
 
Componente originario normalizzato AB Common name Alioth Meaning Goat Other names ALIATH
Coord arcsec 2000 125401.63+555735.4 Mag 1.77 Spectral class A0p (white) PmRA 112.00
PmDE -6.0 SAO 28553 HIP 62956 Tycho2 3845-01190-1
HD 112185 HR 4905 GC 17518 BD BD+56 1627
Bayer Epsilon Ursae Majoris Bayer name Eps UMa Flamsteed 77 Ursae Majoris Flamsteed name 77 UMa
FK5 483
SAO
SAO 28553 DelFlag RA1950 PmRA1950 0.0131
DE1950 PmDE1950 -0.01 Vmag 1.7 SpType A0p
Double code Source 74 CatNum 483 DM BD+56 1627
DMcomp BDsup HD 112185 M HD 0
GC 17518 RA1950rad 3.36776434 DE1950rad 0.98141386 PmRA2000 0.0134
PmDE2000 -0.005
Hipparcos
Catalog H HIP 62956 Proxy RAhms 12 54 01.63
DEdms +55 57 35.4 Vmag 1.76 VarFlag 1 R Vmag G
RAdeg 193.507 DEdeg 55.9598 AstroRef Plx 40.3
CCDM N CCDM Nsys Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 112185 BD BD+56 1627
CD CP Dm number +56 1627 VIred -0.04
SpType A0p R SpType Coord arcsec 2000 125401.63+555735.4
Hipparcos 2
HIP 62956 Sn 5 So 0 Nc 1
RArad 3.3773308557 DErad 0.976683509 Plx 39.51 PmRA 111.91
PmDE -8.24 E RArad 0.16 E DErad 0.15 E Plx 0.2
E pmRA 0.23 E pmDE 0.19 Hpmag 1.7545 E Hpmag 0.0006
SHp 0.008 VA 1 BV -0.022 E BV 0.003
VI -0.04
CCDM
Ccdm 12540+5558 RComp Comp A Note1
Note2 Discov num DRAs 1.75 DDEs -24.5
R dRAs 81 Year Theta Rho
Obs 2 Vmag 1.8 Sp A0 PmNote @
PmRA 112 PmDE -6 Dm number +56 1627 Cat1 BD
Name2 +56 909 Cat2 AGK2/3 HD 112185 M HD
ADS BDS M ADS BDS N N IDS IDS 12496N5630A
HIC 62956
 
 
12540+5558 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 125401.64+555735.5 Calc delta mag 1.77 Calc coord yes
CCDM
Ccdm 12540+5558 RComp Comp B Note1
Note2 Discov num BLM DRAs DDEs
R dRAs Year 1975 Theta 94 Rho 0.1
Obs 1 Vmag Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 12496N5630B
HIC 62956