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Current system
21441+2845
STF 2822 BD


Nearby doubles
21' : 21444+2824
KPP3373

28' : 21461+2855
BRT 58

29' : 21454+2819
J 3145

33' : 21452+2914
UC 4550

35' : 21418+2901
MLB 492

37' : 21462+2817
MLB 540AB

43' : 21416+2911
GRV 493

43' : 21469+2907
CVR 919

45' : 21474+2855
AG 420

45' : 21474+2834
A 300AB

48' : 21420+2924
MLB 539

51' : 21423+2800
GRV 494

54' : 21439+2751
HO 166

55' : 21410+2920
STT 448

57' : 21442+2942
MLB 493

58' : 21480+2819
MLB 541

60' : 21470+2930
GRV 503

64' : 21473+2932
STJ 58

65' : 21458+2945
DAM 236

67' : 21455+2948
DAM 237

68' : 21430+2951
KPP 498

70' : 21420+2741
RAO 465AB

71' : 21390+2826
ES 520

72' : 21401+2928
BRT 57

73' : 21458+2954
TDT3146

73' : 21420+2951
MLB 720



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

21441+2845 STF 2822 BD

 
 
21h 44m 08.46s +28° 44' 34.6" P.A. 45.00 sep 196.7 mag 6.18,6.94 Sp G2V dist. 22.24 pc (72.55 l.y.)
 
 
Coord 2000 21441+2845 Discov num STF2822 Comp BD Coord arcsec 2000 21 44 08.46 +28 44 34.6
Date first 1823 Date last 2012 Obs 24
Pa first 60 Pa last 45 P.A. Now (θ) 45°
Sep first 213.9 Sep last 196.7 Sep. Now (ρ) 196.7"
Mag pri 6.18 Mag sec 6.94 delta mag (ΔM) 0.76 Spectral class G2V (yellow)
Pri motion ra +260 Sec motion ra -001
Pri motion dec -243 Sec motion dec -054
Notes N U (See Notes, Proper motion indicates non-physical)
rPM=0.905
This double is not physical.
 
 
21441+2845 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Mu1 Cyg 89940 21 44 09 +28 44 33 STF 2822 AB 2020 735 325 1.6 4.75 6.18 1.43 Y
Show 89940 21 44 09 +28 44 33 STF 2822 AC 2012 16 292 76.6 4.75 12.93 8.18
Show 89940 21 44 09 +28 44 33 STF 2822 AD 2019 56 43 197.0 4.75 6.94 2.19
Show 89940 21 44 09 +28 44 33 FYM 25 AF 2012 3 72 111.5 4.75 12.64 7.89
Show 89940 21 44 09 +28 44 33 FYM 25 AG 2012 3 73 168.1 4.75 13.77 9.02
Show 89944 21 44 08 +28 44 35 STF 2822 BD 2012 24 45 196.7 6.18 6.94 0.76 <===
Show 89944 21 44 19 +28 46 54 ES 521 DE 2015 7 286 17.5 6.94 13.13 6.19
Show 89944 21 44 19 +28 46 54 FYM 25 DG 2012 3 164 89.6 6.94 13.77 6.83
Septuple system
7 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 89944 HIP 107310 Tycho2 2201-02078-2
HD 206826 HR 8309 GC 30438 ADS 15270
GL Gl 836.6A BD BD+28 4169 Bayer Mu 1 Cygni Bayer name Mu1 Cyg
Flamsteed 78 Cygni Flamsteed name 78 Cyg Distance 22.24 Distance ly 72.55
Bayer greek μ1 Cyg