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Doubles in session


Current system
00491+5749
STF 60 AD


Nearby doubles
14' : 00490+5802
TDS1629

24' : 00469+5735
TDS1610AB

27' : 00503+5725
STI1442

27' : 00465+5731
MLR 651

30' : 00492+5720
A 921AB

30' : 00522+5805
TDS1646

32' : 00479+5819
TDS1615

35' : 00483+5823
STI1429

37' : 00513+5717
TDS1638

37' : 00472+5716
TDS 29

40' : 00492+5830
J 2385

45' : 00434+5750
MLR 649

47' : 00548+5759
STI1471

48' : 00437+5807
STI1419AB

49' : 00531+5713
ES 552

49' : 00486+5701
STI1432

50' : 00514+5705
ES 1868AB

51' : 00429+5742
A 916

51' : 00429+5738
ES 404

52' : 00533+5711
STI1463AB

52' : 00555+5800
ES 1771

53' : 00557+5748
ES 405

54' : 00426+5736
ES 1806

54' : 00513+5840
GIC 14

55' : 00425+5735
TDS1575

56' : 00450+5833
BKO 138



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00491+5749 STF 60 AD

 
 
00h 49m 06.29s +57° 48' 54.7" P.A. 354.00 sep 189.4 mag 3.52,12.80 Sp G0V dist. 5.95 pc (19.41 l.y.)
 
 
Coord 2000 00491+5749 Discov num STF  60 Comp AD Coord arcsec 2000 00 49 06.29 +57 48 54.7
Date first 1912 Date last 2011 Obs 7
Pa first 34 Pa last 354 P.A. Now (θ) 354°
Sep first 159.8 Sep last 189.44 Sep. Now (ρ) 189.44"
Mag pri 3.52 Mag sec 12.80 delta mag (ΔM) 9.28 Spectral class G0V (yellow)
Pri motion ra +109 Sec motion ra +000
Pri motion dec -056 Sec motion dec +000
Notes N L P (See Notes, Linear solution, 100-year proper motion)
rPM=1
This double is not physical.
 
 
00491+5749 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 21732 00 49 06 +57 48 55 STF 60 Aa,Ab 2015 2 134 5.1 3.52
Show Achird 21732 00 49 06 +57 48 55 STF 60 AB 2023 1087 328 13.5 3.52 7.36 3.84 Y
Show 21732 00 49 06 +57 48 55 STF 60 AC 2000 4 260 225.0 3.52 11.40 7.88
Show 21732 00 49 06 +57 48 55 STF 60 AD 2011 7 354 189.4 3.52 12.80 9.28 <===
Show 21732 00 49 06 +57 48 55 STF 60 AE 2023 25 126 66.0 3.52 10.15 6.63
Show 21732 00 49 06 +57 48 55 STF 60 AF 2000 3 276 378.3 3.52 11.53 8.01
Show 21732 00 49 06 +57 48 55 STF 60 AG 2012 19 259 419.7 3.52 9.53 6.01
Show 21732 00 49 06 +57 48 55 STF 60 AH 2012 4 355 701.1 3.52 8.41 4.89
Show 21732 00 49 06 +57 48 55 SMR 2 AI 2012 7 73 90.3 3.52 11.60 8.08
Show 21732 00 49 06 +57 48 55 SMR 2 AJ 2012 5 262 237.1 3.52 12.30 8.78
Show 21732 00 49 05 +57 49 04 STF 60 BC 2016 5 259 235.4 7.36 11.40 4.04
Show 21732 00 49 05 +57 49 04 STF 60 BD 2000 1 1 172.2 7.36 12.80 5.44
Show 21732 00 49 05 +57 49 04 STF 60 BE 2020 4 126 105.5 7.36 10.15 2.79
Show 21732 00 49 05 +57 49 04 STF 60 BF 2016 3 275 388.1 7.36 11.53 4.17
Show 21732 00 49 05 +57 49 04 STF 60 BG 2016 3 256 420.0 7.36 9.53 2.17
Show 21730 00 49 05 +57 49 04 STF 60 BH 2020 5 355 688.4 7.36 8.41 1.05
Show 00 48 19 +57 49 34 STF 60 FG 2015 10 188 142.2 11.53 9.53 2.00
11-fold system
10 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Achird Constellation Cassiopeia SAO 21732 HIP 3821
Tycho2 3663-02669-1 HD 4614 HR 219 GC 962
ADS 671 BD BD+57 150 Bayer Eta Cassiopeiae Bayer name Eta Cas
Flamsteed 24 Cassiopeiae Flamsteed name 24 Cas Distance 5.95 Distance ly 19.41
Bayer greek η Cas
Other names MARFAK
Meaning first applied to ? Cassiopeiae in the Skalnate Pleso Atlas of the Heavens published in 1950, but is not known prior to that.