02318+8916 STF 93 AB (Polaris)

 
 
02h 31m 49.09s +89 15' 50.7" P.A. 236.00 sep 18.4 mag 2.04,9.10 Sp F7Ib+F3V dist. 132.63 pc (432.64 l.y.)
 
 
Coord 2000 02318+8916 Discov num STF  93 Comp AB Coord arcsec 2000 02 31 49.09 +89 15 50.7
Date first 1779 Date last 2016 Obs 65
Pa first 203 Pa last 235.7 P.A. Now (θ) 235.7°
Sep first 17.3 Sep last 18.39 Sep. Now (ρ) 18.39"
Mag pri 2.04 Mag sec 9.10 delta mag (ΔM) 7.06 Spectral class F7Ib+F3V (yellow-white/yellow-white)
Pri motion ra +038 Sec motion ra
Pri motion dec -015 Sec motion dec
Notes N V (See Notes, Proper motion indicates physical)
This double is physical.
 
 
02318+8916 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 308 02 31 49 +89 15 51 WRH 39 Aa,Ab 2014 8 175 0.1 2.30 4.30 2.00 Y
Show Polaris 308 02 31 49 +89 15 51 STF 93 AB 2016 65 236 18.4 2.04 9.10 7.06 <===
Show 308 02 31 49 +89 15 51 STF 93 AC 2016 7 103 39.0 2.04 13.80 11.76
Show 308 02 31 49 +89 15 51 STF 93 AD 2016 8 194 83.2 2.04 14.30 12.26
Show 02 30 43 +89 15 39 STF 93 BC 2015 4 83 53.1 9.10 13.80 4.70
Show 02 30 43 +89 15 39 STF 93 BD 2014 3 179 69.4 9.10 14.30 5.20
Quintuple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Polaris Constellation Ursa Minor SAO 308 HIP 11767
Tycho2 4628-00237-1 Gaia DR2 576402619921505664 HD 8890 HR 424
GC 2243 ADS 1477 BD BD+88 8 Bayer Alpha Ursae Minoris
Bayer name Alp UMi Flamsteed 1 Ursae Minoris Flamsteed name 1 UMi FK5 907
Distance 132.63 Distance ly 432.64 Bayer greek α UMi
Other names Lodestar, Cynosura, Alruccabah, Phoenice, Polare, Stella Polare, Tramontana, Angel Stern, Navigatoria, Star of Arcady, Yilduz, Mismar, Polyarnaya
 
 
WDS 02318+8916 STF 93 AB (Polaris) : NOTES
 
 
discov_num notes refcode
STF 93 alp Umi = 1 UMi = Polaris. Cepheid variable and spectroscopic binary,
P = 30y. A close companion has been suspected. The close pair,
measured three time from 1937-1939 by R.H. Wilson using an eyepiece WRH1941b
interferometer, was not seen again until Evans et al. (2006) resolved Evs2006
it with HST. Wilson's measures agree with the combined astrometric/
spectroscopic solution by Gerasimovic (1936), although both orbit and Ger1936
measures are called into dispute by the more recent orbit of Wielan et Wln2000
al. (2000), whose solution includes mass estimates, etc.
NPOI Limb-darkened diameter 3.28 +/- 0.02 mas, NOI1999
R = 46. +/- 3. \rsun.
An earlier orbit by Wyller (1957) was rejected from Fourth Orbit Wye1957
Catalog ("amplitude below noise level") Wor1983
Component B = BD+88@@@7. See discussion of this system by Roemer. Re_1965
While Hipparcos parallax of A 7.56 +/- 0.48 from the original mission HIP1997a
and 7.54 +/- 0.011 mas from the re-reduction, the HST-FGS parallax of VlF2007
B = 6.26 +/- 0.24 mas implies that that A is high luminosity and BdH2018
pulsating in the second overtone if AB is physical, i.e., the distance
to B is the same as A.
The C component was observed by Burnham in the late 19th century, then Bu_1894
not seen again until the early 21st century by Daley and Ashcroft. Dal2006a
The extremely large magnitude makes the pair too close for most large
astrometric surveys.
The D component has also been recently recovered in 2MASS data. TMA2003
According to Jim Daley, the R-I color for C is 0.56 and for D it is
0.67. The V-I color for D is 1.08. Dal2006b
AB: H 4 1. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
BdH2018 not - Bond, H.E., Nelan, E.P., Evans, N.R., Schaefer, G.H. & Harmer, D. 2018ApJ...853...55B
BdH2018 ApJ 853, 55, 2018
Bu_1894 Ma j Burnham, S.W. 1894PLicO...2....3B
Bu_1894 Pub. Lick Obs. 2, 3, 1894 (includes most data from Bu_1893a) 1893AN....131..329B
Dal2006a C u Daley, J.A. 2006JDSO....2...44D
Dal2006a JDSO 2, 44, 2006
Dal2006b - Daley, J.A. 2006JDSO....2...51D
Dal2006b JDSO 2, 51, 2006
Evs2006 H j Evans, N.R., Franz, O., Massa, D., Mason, B., Walker, R.L., & Marovska, M. 2006PASP..118.1545E
Evs2006 +S PASP 118, 1545, 2006
Ger1936 orb - Gerasimovic, B.P. .
Ger1936 Pulkova Obs. Circ. #19, 1, 1936
HIP1997a Hh - Hipparcos 1997yCat.1239....0E
HIP1997a Hipparcos Catalog, ESA SP-1200, 1997 (incl. Hp photometry, vol. 10)
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
NOI1999 not j Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias, 1999AJ....118.3032N
NOI1999 II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S., .
NOI1999 Armstrong, J.T., Pauls, T.A. & Rickard, L.J. .
NOI1999 AJ 118, 3032, 1999 .
Re_1965 - Roemer, E. 1965ApJ...141.1415R
Re_1965 ApJ 141, 1415, 1965
TMA2003 E2 j 2MASS Catalog .
TMA2003 2MASS Point Src Cat., 2003 all-sky release (http://pegasus.phast.umass.edu/)
TMA2003 (Note: 2MASS photometry also added by cataloguer to 2MASS astrometry published
TMA2003 under other references.)
TMA2003 Thurgood Marshall High School
VlF2007 - van Leeuwen, F. 2007A&A...474..653V
VlF2007 A&A 474, 653, 2007
Wln2000 orb - Wielen, R., Jahreiss, H., Dettbarn, C., Lenhardt, H., & Schwan, H. 2000A&A...360..399W
Wln2000 A&A 360, 399, 2000
Wor1983 - Worley, C.E. & Heintz, W.D. 1983PUSNO..24g...1W
Wor1983 Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)
WRH1941b J - Wilson, R.H. 1941PFAO....6b...1W
WRH1941b +Ma Pub. Univ. Penn. 6, Pt.4, 21, 1941
WRH1941b (U and T coded observations per van den Bos, J Obs 34, 85, 1951) 1951JO.....34...85V
Wye1957 orb - Wyller, A.A. 1957AJ.....62..384W
Wye1957 AJ 62, 384, 1957
 
 
DISCOVERER
 
 
idgroup discov author
1 BDH Bond, H.E., Gilliland, R.L., Schaefer, G.H., Demarque, P., Girard, T.M.,
1 BDH Holberg, J.B., Gudehus, D., Mason, B.D., Kozhurina-Platais, V., Burleigh, M.R.,
1 BDH Barstow, M.A., & Nelan, E.P.
2 BDH Bond, H.E., Schaefer, G.H., Gilliland, R.L., Holberg, J.B., Mason, B.D.,
2 BDH Lindenblad, I.W., Seitz-McLeese, M., Arnett, W.D., Demarque, P., Spada, F.,
2 BDH Young, P.A., Barstow, M.A., Burleigh, M.R. & Gudehus, D.
249 EVS Evans, N.R., Schaefer, G.H., Bond, H., Bono, G., Karovska, M., Nelan, E.,
249 EVS Sasselov, D., & Mason, B.D.
258 EVS Evans, N.R., Pillitteri, I., Wolk, S., Karovska, M., Tingle, E., Guinan, E.,
258 EVS Engle, S., Bond, H.E., Schaefer, G.H., & Mason, B.D.
259 EVS Evans, N.R., Karovska, M., Bond, H.E., Schaefer, G.H., Sahu, K.C., Mack, J.,
259 EVS Nelan, E.P., Gallenne, A. & Tingle, E.D.
260 EVS Evans, N.R., Pillitteri, I., Molnar, L., Szabados, L., Plachy, E., Szabo, R.,
260 EVS Engle, S., Guinan, E., Wolk, S., Gunther, H.M., Neilson, H., Marengo, M., Matthews,
260 EVS L.D., Moschou, S., Drake, J.J., Kashyap, V., Kervella, P., Tordai, T., Somogyi, P.
262 EVS Evans, N.R., Gunther, H.M., Bond, H.E., Schaefer, G.H., Mason, B.D., Karovska, M.,
262 EVS Tingle, E., Wolk, S., Engle, S., Guinan, E., Pillitteri, I., Proffitt, C.,
262 EVS Kervella, P. & Gallenne, A.
281 HIP (non-component double star solution: G = acceleration solution,
281 HIP O = orbit solution, V = variability-induced mover, X = stochastic solution)
290 NOI Benson, J.A., Hutter, D.J., Elias, N.M., Bowers, P.F., Johnston, K.J.,
290 NOI Hajian, A.R., Armstrong, J.T., Mozurkewich, D., et al.
294 NOI Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,
294 NOI II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,
294 NOI Armstrong, J.T., Pauls, T.A. & Rickard, L.J.
297 NOI Armstrong, J.T., Nordgren, T.E., Germain, M.E., Hajian, A.R., Hindsley, R.B.,
297 NOI Hummel, C.A., Mozurkewich, D. & Thessin, R.N.
300 NOI Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N.,
300 NOI Peterson, D.M., Hummel, C.A., & Gilbreath, G.C.
301 NOI Koubsky, P., Hummel, C.A., Harmanec, P., Tycner, C., van Leeuwen, F., Yang, S.,
301 NOI Slechta, M., Bozic, H., Zavala, R.T., Ruzdjak, D., & Sudar, D.
311 NOI Che, X., Monnier, J.D., Tycner, C., Kraus, S., Zavala, R.T., Baron, F., Pedretti,
311 NOI E., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Sturmann, J., Sturmann, L.,
311 NOI & Turner, N.
317 NOI Hutter, D.J., Zavala, R.T., Tycner, C., Benson, J.A., Hummel, C.A., Sanborn, J.,
317 NOI Franz, O.G., & Johnston, K.J.
318 NOI Schaefer, G.H., Hummel, C.A., Gies, D.R., Zavala, R.T., Monnier, J.D.,
318 NOI Walter, F.M., Turner, N.H., Baron, F., ten Brummelaar, T., Che, X.,
318 NOI Farrington, C.D., Kraus, S., Sturmann, J., & Sturmann, L.
319 NOI Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter,
319 NOI D.J., Tycner, C. & van Belle, G.T.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
02318+8916 STF 93 AB 2006 59 231 18.2 2.10 9.10 F7:Ib-IIv N D 023147.08+891550.9
02318+8916 STF 93 AB 2009 60 232 18.2 2.10 9.10 F7:Ib-IIv N D 023147.08+891550.9
02318+8916 STF 93 AB 2013 63 233 18.1 2.04 9.10 F7:Ib-IIv N D 023147.08+891550.9
02318+8916 STF 93 AB 2016 64 236 18.4 2.04 9.10 F7:Ib-IIv NV 023149.09+891550.7

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WDS 02318+8916 STF 93 AB (Polaris) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 02318+8916 STF 93 AB (Polaris) : MEASURES
 
 
No records found.

 
 
WDS 02318+8916 (Polaris) : VIRTUAL EYEPIECE
 
 

02318+8916 STF  93A mag 2.04 Sp F7Ib 02318+8916 WRH  39Ab sep 0.1 P.A. 179.90 mag 4.3 Sp IIv 02318+8916 STF  93B sep 17.5 P.A. 226.30 mag 9.1 02318+8916 STF  93C sep 8.7 P.A. 176.80 mag 13.8 Sp II 02318+8916 STF  93D sep 80.8 P.A. 180.20 mag 14.3 Sp II virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.

Radius:
Components only
 
 
WDS 02318+8916 (Polaris) : ALADIN DSS IMAGE @ 02h 31m 49.09s +89 15' 50.7"
 
 
 
 
WDS 02318+8916 STF 93 AB (Polaris) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


02318+8916  WRH  39Aa,Ab (Polaris) distance=1' 02318+8916  STF  93AB (Polaris) distance=1' 02318+8916  STF  93AC (Polaris) distance=1' 02318+8916  STF  93AD (Polaris) distance=1' 02318+8916  STF  93BC distance=1' 02318+8916  STF  93BD distance=1' 02468+8824  LOC  14 distance=53' 02379+8806  LOC  51 distance=70' 02215+8803  LOC  50 distance=73' 02393+8728  LOC  48 distance=108' 02283+8708  LOC  49 distance=129' 02460+8628  LOC  13 distance=169' 02390+8611  TDS2317 distance=186' 02438+8536  LOC  12 distance=220' 02282+8511  HJ 2110AB distance=246' 02282+8511  HJ 2110AC distance=246' 02260+8441  LDS1552 distance=275' 02217+8435  MLR 487 distance=281' 02344+8418  LOC  47 distance=298' 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 Polaris 02318+8916 WRH 39 Aa,Ab 175 0.1 1
Show Polaris 02318+8916 STF 93 AB 236 18.4 1
Show Polaris 02318+8916 STF 93 AC 103 39.0 1
Show Polaris 02318+8916 STF 93 AD 194 83.2 1
Show 02318+8916 STF 93 BC 83 53.1 1
Show 02318+8916 STF 93 BD 179 69.4 1
Show 02468+8824 LOC 14 194 6.2 53
Show 02379+8806 LOC 51 296 3.4 70
Show 02215+8803 LOC 50 213 3.1 73
Show 02393+8728 LOC 48 224 5.8 108
Show 02283+8708 LOC 49 65 3.8 129
Show 02460+8628 LOC 13 180 4.7 169
Show 02390+8611 TDS2317 190 0.6 186
Show 02438+8536 LOC 12 183 35.0 220
Show 02282+8511 HJ 2110 AB 324 5.1 246
Show 02282+8511 HJ 2110 AC 315 41.2 246
Show 02260+8441 LDS1552 146 3.7 275
Show 02217+8435 MLR 487 270 1.6 281
Show 02344+8418 LOC 47 200 8.2 298

 
 
WDS 02318+8916 : COMPONENTS
 
 
  A Ab B C
Ab pa=179.9°
sep=0.08"
 
B pa=226.3°
sep=17.52"
pa=226.5°
sep=17.47"
 
C pa=176.8°
sep=8.65"
pa=176.7°
sep=8.57"
pa=75.3°
sep=13.63"
 
D pa=180.2°
sep=80.81"
pa=180.2°
sep=80.73"
pa=169.7°
sep=69.86"
pa=180.6°
sep=72.18"
 
 
02318+8916 A
 
 
Common name Polaris Other names Lodestar, Cynosura, Alruccabah, Phoenice, Polare, Stella Polare, Tramontana, Angel Stern, Navigatoria, Star of Arcady, Yilduz, Mismar, Polyarnaya Coord arcsec 2000 023149.09+891550.7 Mag 2.04
Spectral class F7Ib (yellow-white) PmRA 38.00 PmDE -15.0 SAO 308
HIP 11767 Tycho2 4628-00237-1 HD 8890 HR 424
GC 2243 BD BD+88 8 Bayer Alpha Ursae Minoris Bayer name Alp UMi
Flamsteed 1 Ursae Minoris Flamsteed name 1 UMi FK5 907
Tycho2
Tycho2 4628-00237-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 2.708 E BTmag 0.014 VTmag 2.038
E VTmag 0.009 Prox 999 TYC T HIP 11767
CCDM RAdeg 37.94661861 DEdeg 89.26413528 EpRA 1990 1.69
EpDE 1990 1.75 E RAdeg 3.2 E DEdeg 3.2 Posflg
Corr 0.1
SAO
SAO 308 DelFlag RA1950 PmRA1950 0.1811
DE1950 PmDE1950 -0.004 Vmag 2.1 SpType F8v
Double code Source 74 CatNum 907 DM BD+88 8
DMcomp BDsup HD 8890 M HD 0
GC 2243 RA1950rad 0.47478668 DE1950rad 1.55384597 PmRA2000 0.2012
PmDE2000 -0.016
Hipparcos
Catalog H HIP 11767 Proxy RAhms 02 31 47.08
DEdms +89 15 50.9 Vmag 1.97 VarFlag 1 R Vmag H
RAdeg 37.9461 DEdeg 89.2641 AstroRef Plx 7.56
CCDM 02319+8915 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 8890 BD BD+88 8
CD CP Dm number +88 8 VIred 0.68
SpType F7:Ib-IIv SB R SpType Coord arcsec 2000 023147.08+891550.9
Hipparcos 2
HIP 11767 Sn 5 So 0 Nc 1
RArad 0.6622851337 DErad 1.5579531082 Plx 7.54 PmRA 44.48
PmDE -11.85 E RArad 0.09 E DErad 0.1 E Plx 0.11
E pmRA 0.11 E pmDE 0.13 Hpmag 2.1077 E Hpmag 0.0021
SHp 0.014 VA 1 BV 0.636 E BV 0.003
VI 0.7
 
 
02318+8916 Ab
 
 
Coord arcsec 2000 023149.09+891550.6 Mag 4.3 Spectral class IIv Calc delta mag 2
Calc coord yes
 
 
02318+8916 B
 
 
Coord arcsec 2000 023043.45+891538.6 Coord calc 023043.45+891538.6 Mag 9.1 Calc delta mag 6.8
 
 
02318+8916 C
 
 
Coord arcsec 2000 023151.62+891542.1 Mag 13.8 Spectral class II Calc delta mag 11.5
Calc coord yes
 
 
02318+8916 D
 
 
Coord arcsec 2000 023147.78+891429.9 Mag 14.3 Spectral class II Calc delta mag 12
Calc coord yes