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Doubles in session


Current system
20521+4923
ES 811


Nearby doubles
25' : 20540+4905
HEI 913

38' : 20541+4850
CTI5707

52' : 20572+4936
KPP1431

52' : 20496+5008
ES 94AB

54' : 20470+4901
HDS2962

69' : 20529+4814
ES 812

69' : 20457+4951
TDT2521

69' : 20466+5004
HDS2959

70' : 20465+5005
HDS2958

70' : 20570+5013
TDT2651

76' : 20486+5029
BU 366AB

78' : 20499+5036
CBL 87

79' : 21001+4911
HJ 1604

81' : 20496+4805
HJ 1584

82' : 20438+4921
HEI 911

82' : 20573+4818
HDS2987

83' : 20441+4856
HEI 912

83' : 21005+4911
RAO 445

85' : 20434+4923
STJ 111

88' : 20595+5013
BU 68

89' : 20496+5047
HDS2968

89' : 21001+4841
BU 1210AB

91' : 20585+5028
STF2741AB

92' : 20564+5044
BU 1137

93' : 20449+5023
SKF2395

93' : 20454+4816
UC 254



Selections
Full WDS
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.

20521+4923 ES 811

 
 
20h 52m 05.96s +49° 21' 49.1" P.A. 158.00 sep 1.4 mag 10.34,10.43 Sp G0
 
 
Coord 2000 20521+4923 Discov num ES  811 Comp Coord arcsec 2000 20 52 05.96 +49 21 49.1
Date first 1911 Date last 2016 Obs 12
Pa first 155 Pa last 158 P.A. Now (θ) 158°
Sep first 1.6 Sep last 1.392 Sep. Now (ρ) 1.392"
Mag pri 10.34 Mag sec 10.43 delta mag (ΔM) 0.09 Spectral class G0 (yellow)
Pri motion ra -043 Sec motion ra -043
Pri motion dec -016 Sec motion dec -016
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 3583-00040-1 Gaia DR2 2167346089342456960
 
 
WDS 20521+4923 ES 811 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Es_1901 Mb - Espin, T.E. 1901AN....155..321E
Es_1901 AN 155, 321, 1901 (ES 1 - 39)
Es_1902a Ma - Espin, T.E. 1902AN....158..241E
Es_1902a +Mb AN 158, 241, 1902 (ES 40 - 112)
Es_1902b Mb - Espin, T.E. 1902MNRAS..62..528E
Es_1902b MNRAS 62, 528, 1902
Es_1902c Mb j Espin, T.E. 1902MNRAS..62..402E
Es_1902c MNRAS 62, 402, 1902
Es_1903 Mb - Espin, T.E. 1903MNRAS..63..172E
Es_1903 MNRAS 63, 172, 1903 (ES 113 - 150)
Es_1904a - Espin, T.E. 1904MNRAS..64..238E
Es_1904a MNRAS 64, 238, 1904 (data superceded by MNRAS 65, 710, 1905) 1905MNRAS..65..710E
Es_1904b Mb - Espin, T.E. 1904MNRAS..64..675E
Es_1904b MNRAS 64, 675, 1904
Es_1905 Mb - Espin, T.E. 1905MNRAS..65..710E
Es_1905 MNRAS 65, 710, 1905 (ES 151 - 221)
Es_1906a Mb - Espin, T.E. 1906MNRAS..66..141E
Es_1906a MNRAS 66, 141, 1906 (ES 222 - 269)
Es_1906b Mb - Espin, T.E. 1906MNRAS..66..430E
Es_1906b MNRAS 66, 430, 1906 (ES 270 - 311)
Es_1906C Mb - Espin, T.E. 1906QB821.B972.....
Es_1906C cited in BDS (Burnham Double Star Cat.), 1906
Es_1906D Mb - Espin, T.E. 1906MmRAS..56....1L
Es_1906D cited by Lewis (MemRAS 56, 1, 1906)
Es_1907a Mb j Espin, T.E. 1907MNRAS..67..190E
Es_1907a MNRAS 67, 190, 1907 (ES 312 - 403)
Es_1907b Mb - Espin, T.E. 1907MNRAS..67..495E
Es_1907b MNRAS 67, 495, 1907 (ES 404 - 442)
Es_1908a Mb j Espin, T.E. 1908MNRAS..68..202E
Es_1908a MNRAS 68, 202, 1908 (ES 443 - 551)
Es_1908b Mb - Espin, T.E. 1908MNRAS..68..523E
Es_1908b MNRAS 68, 523, 1908 (ES 552 - 609)
Es_1908c - Espin, T.E. 1908JRASC...2..248E
Es_1908c JRASC 2, 248, 1908 (data also in MNRAS 69, 218, 1909) 1909MNRAS..69..218E
Es_1909a Mb j Espin, T.E. 1909MNRAS..69..218E
Es_1909a MNRAS 69, 218, 1909 (ES 610 - 704)
Es_1909b Mb j Espin, T.E. 1909MNRAS..69..604E
Es_1909b MNRAS 69, 604, 1909 (ES 705 - 743)
Es_1910a Mb - Espin, T.E. 1910MNRAS..70..237E
Es_1910a MNRAS 70, 237, 1910 (ES 744 - 864)
Es_1910b Mb - Espin, T.E. 1910MNRAS..70..541E
Es_1910b MNRAS 70, 541, 1910 (ES 865 - 927)
Es_1911 Mb - Espin, T.E. 1911MNRAS..71..217E
Es_1911 MNRAS 71, 217, 1911 (ES 928 - 1051)
Es_1912 Mb - Espin, T.E. 1912MNRAS..72..191E
Es_1912 MNRAS 72, 191, 1912 (ES 1052 - 1125)
Es_1913 Mb j Espin, T.E. 1913MNRAS..73..162E
Es_1913 MNRAS 73, 162, 1913 (ES 1126 - 1191)
Es_1914 Mb j Espin, T.E. 1914MNRAS..74..244E
Es_1914 MNRAS 74, 244, 1914 (ES 1192 - 1293)
Es_1915a Mb - Espin, T.E. 1915MNRAS..75..203E
Es_1915a MNRAS 75, 203, 1915 (ES 1294 - 1356)
Es_1915b Mb - Espin, T.E. 1915MNRAS..75..555E
Es_1915b MNRAS 75, 555, 1915 (ES 1357 - 1405)
Es_1915c Mb - Espin, T.E. 1915MNRAS..76..210E
Es_1915c MNRAS 76, 210, 1915 (ES 1406 - 1479)
Es_1917 Mb - Espin, T.E. 1917MNRAS..77..236E
Es_1917 MNRAS 77, 236, 1917 (ES 1480 - 1600)
Es_1918 Mb j Espin, T.E. 1918MNRAS..78..189E
Es_1918 MNRAS 78, 189, 1918 (ES 1601 - 1705, MLB 1 - 35)
Es_1919 Mb - Espin, T.E. 1919MNRAS..79..211E
Es_1919 MNRAS 79, 211, 1919 (ES 1706 - 1768, MLB 36 - 106)
Es_1920 Mb - Espin, T.E. 1920MNRAS..80..329E
Es_1920 MNRAS 80, 329, 1920 (ES 1769 - 1805, MLB 107 - 149)
Es_1921 Mb j Espin, T.E. 1921MNRAS..81..232E
Es_1921 MNRAS 81, 232, 1921 (ES 1806 - 1864, MLB 150 - 182)
Es_1922 Mb - Espin, T.E. 1922MNRAS..82..187E
Es_1922 MNRAS 82, 187, 1922 (ES 1865 - 1933, MLB 183 - 241)
Es_1923 Mb - Espin, T.E. 1923MNRAS..83..154E
Es_1923 MNRAS 83, 154, 1923 (ES 1934 - 2006, MLB 242 - 275)
Es_1924 Mb - Espin, T.E. 1924MNRAS..84..162E
Es_1924 MNRAS 84, 162, 1924 (ES 2007 - 2078, MLB 276 - 322)
Es_1925a Mb - Espin, T.E. 1925MNRAS..85..276E
Es_1925a MNRAS 85, 276, 1925 (ES 2079 - 2137, MLB 323 - 376)
Es_1925b Mb - Espin, T.E. 1925MNRAS..86...79E
Es_1925b MNRAS 86, 79, 1925
Es_1926 Mb - Espin, T.E. 1926MNRAS..86..131E
Es_1926 MNRAS 86, 131, 1926 (ES 2138 - 2209, MLB 377 - 440)
Es_1927 Mb - Espin, T.E. 1927MNRAS..87..215E
Es_1927 MNRAS 87, 215, 1927 (ES 2210 - 2273, MLB 441 - 510)
Es_1928 Mb - Espin, T.E. 1928MNRAS..88..185E
Es_1928 MNRAS 88, 185, 1928 (ES 2274 - 2328, MLB 511 - 551)
Es_1929 Mb - Espin, T.E. 1929MNRAS..89..268E
Es_1929 MNRAS 89, 268, 1929 (ES 2329 - 2362, MLB 552 - 591)
Es_1930 Mb - Espin, T.E. 1930MNRAS..90..317E
Es_1930 MNRAS 90, 317, 1930 (ES 2363 - 2400, MLB 592 - 630)
Es_1931 Mb - Espin, T.E. 1931MNRAS..91..294E
Es_1931 MNRAS 91, 294, 1931 (ES 2401 - 2444, MLB 631 - 673)
Es_1932a Mb - Espin, T.E. 1932MNRAS..92..214E
Es_1932a MNRAS 92, 214, 1932 (ES 2445 - 2543, MLB 674 - 732)
Es_1932B Mb - Espin, T.E. 1932QB821.A43......
Es_1932B cited in ADS (Aitken Double Star Cat.), 1932
Es_1933 Mb - Espin, T.E. 1933MNRAS..93..192E
Es_1933 MNRAS 93, 192, 1933 (ES 2544 - 2575, MLB 733 - 806)
Es_1937A Mb - Espin, T.E. 1937AnLei..18....1S
Es_1937A cited by Strand (Ann. Sterrew. Leiden 18, 1937)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20521+4923 ES 811 2001 11 159 1.3 10.34 10.43 205205.96+492149.1
20521+4923 ES 811 2010 12 159 1.4 10.34 10.43 205205.96+492149.1
20521+4923 ES 811 2016 12 158 1.4 10.34 10.43 G0 205205.96+492149.1

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

 
 
WDS 20521+4923 ES 811 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20521+4923 ES 811 : MEASURES
 
 
No records found.

 
 
WDS 20521+4923 : VIRTUAL EYEPIECE
 
 

20521+4923 ES 811A mag 10.34 Sp G0 20521+4923 ES 811B sep 1.3 P.A. 165.30 mag 10.43 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 20521+4923 : ALADIN DSS IMAGE @ 20h 52m 05.96s +49° 21' 49.1"
 
 
 
 
WDS 20521+4923 ES 811 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20521+4923 ES 811 distance=0' 20540+4905 HEI 913 distance=25' 20541+4850 CTI5707 distance=38' 20572+4936 KPP1431 distance=52' 20496+5008 ES 94AB distance=52' 20496+5008 GUI 34AD distance=52' 20496+5008 ES 94BC distance=53' 20470+4901 HDS2962 distance=54' 20529+4814 ES 812 distance=69' 20457+4951 TDT2521 distance=69' 20466+5004 HDS2959 distance=69' 20465+5005 HDS2958 distance=70' 20570+5013 TDT2651 distance=70' 20486+5029 D 23CD distance=76' 20486+5029 BU 366AB distance=76' 20486+5029 BU 366AC distance=76' 20499+5036 CBL 87 distance=78' 21001+4911 HJ 1604 distance=79' 20496+4805 HJ 1584 distance=81' 20438+4921 HEI 911 distance=82' 20573+4818 HDS2987 distance=82' 20441+4856 HEI 912 distance=83' 21005+4911 RAO 445 distance=83' 20434+4923 STJ 111 distance=85' 20595+5013 BU 68 distance=88' 20496+5047 HDS2968 distance=89' 21001+4841 STT 425CD distance=89' 21001+4841 BU 1210AB distance=89' 21001+4841 STT 425AC distance=89' 21001+4841 STT 425AE distance=89' 20585+5028 STF2741AB distance=91' 20585+5028 STF2741AC distance=91' 20564+5044 BU 1137 distance=92' 20585+5028 BU 9007CD distance=92' 20449+5023 SKF2395 distance=93' 20454+4816 UC 254 distance=93' 20425+4916 ARG 39AB distance=95' 20425+4916 ARG 39AF distance=95' 20425+4916 ARG 39AG distance=95' 20425+4916 ARG 39BC distance=95' 20425+4916 ARG 39BD distance=95' 20425+4916 ARG 39BE distance=95' 20557+4755 ES 813 distance=95' 21016+4948 TDT2700 distance=96' 20478+4754 ES 2253 distance=99' 20567+4754 ES 814AB distance=99' 20567+4754 CRB 14AC distance=99' 20457+5040 STT 412AB distance=100' 20457+5040 STT 412AC distance=100' 20483+5054 ES 998 distance=100' 21019+4952 HER 26 distance=100' 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 20521+4923 ES 811 158 1.4
Show 20540+4905 HEI 913 14 2.1 25
Show 20541+4850 CTI5707 148 12.3 38
Show 20572+4936 KPP1431 57 10.7 52
Show 20496+5008 ES 94 AB 15 102.7 52
Show 20496+5008 GUI 34 AD 58 86.9 52
Show 20496+5008 ES 94 BC 79 2.5 53
Show 20470+4901 HDS2962 222 0.1 54
Show 20529+4814 ES 812 169 8.5 69
Show 20457+4951 TDT2521 236 0.3 69
Show 20466+5004 HDS2959 21 0.5 69
Show 20465+5005 HDS2958 334 0.1 70
Show 20570+5013 TDT2651 209 1.9 70
Show 20486+5029 D 23 CD 5 1.7 76
Show 20486+5029 BU 366 AB 130 1.5 76
Show 20486+5029 BU 366 AC 105 51.1 76
Show 20499+5036 CBL 87 2 25.0 78
Show 21001+4911 HJ 1604 143 30.5 79
Show 20496+4805 HJ 1584 223 4.3 81
Show 20438+4921 HEI 911 125 2.4 82
Show 20573+4818 HDS2987 3 0.4 82
Show 20441+4856 HEI 912 201 1.7 83
Show 21005+4911 RAO 445 121 0.9 83
Show 20434+4923 STJ 111 64 0.9 85
Show 20595+5013 BU 68 149 2.0 88
Show 20496+5047 HDS2968 69 0.3 89
Show 21001+4841 STT 425 CD 132 4.3 89
Show 21001+4841 BU 1210 AB 118 2.4 89
Show 21001+4841 STT 425 AC 27 18.2 89
Show 21001+4841 STT 425 AE 15 45.4 89
Show 20585+5028 STF2741 AB 24 2.0 91
Show 20585+5028 STF2741 AC 355 138.6 91
Show 20564+5044 BU 1137 350 7.4 92
Show 20585+5028 BU 9007 CD 50 13.3 92
Show 20449+5023 SKF2395 204 4.1 93
Show 20454+4816 UC 254 181 17.9 93
Show 20425+4916 ARG 39 AB 184 15.4 95
Show 20425+4916 ARG 39 AF 258 34.4 95
Show 20425+4916 ARG 39 AG 341 52.4 95
Show 20425+4916 ARG 39 BC 100 35.4 95
Show 20425+4916 ARG 39 BD 241 21.1 95
Show 20425+4916 ARG 39 BE 55 44.1 95
Show 20557+4755 ES 813 237 7.3 95
Show 21016+4948 TDT2700 19 1.6 96
Show 20478+4754 ES 2253 335 3.4 99
Show 20567+4754 ES 814 AB 6.0 99
Show 20567+4754 CRB 14 AC 58 6.4 99
Show 20457+5040 STT 412 AB 279 26.0 100
Show 20457+5040 STT 412 AC 268 26.2 100
Show 20483+5054 ES 998 176 3.2 100
Show 21019+4952 HER 26 249 29.3 100

 
 
WDS 20521+4923 : COMPONENTS
 
 
  A
B pa=165.3°
sep=1.33"
 
 
20521+4923 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 205205.96+492149.1 Mag 10.34 Spectral class G0 (yellow)
PmRA -43.00 PmDE -16.0 Tycho2 3583-00040-1
Tycho2
Tycho2 3583-00040-1 Pflag P RAmdeg 313.02483370 DEmdeg 49.36362890
PmRA -42.6 PmDE -15.9 E RAmdeg 28 E DEmdeg 29
E pmRA 2.7 E pmDE 2.4 EpRAm 1990.48 EpDEm 1990.10
Num 4 Q RAmdeg 0.3 Q DEmdeg 0.5 Q pmRA 0.3
Q pmDE 0.5 BTmag 11.066 E BTmag 0.050 VTmag 10.336
E VTmag 0.040 Prox 14 TYC T HIP
CCDM RAdeg 313.02486222 DEdeg 49.36385611 EpRA 1990 1.72
EpDE 1990 1.75 E RAdeg 28.3 E DEdeg 28.7 Posflg D
Corr 0.0
 
 
20521+4923 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 205205.99+492147.8 Mag 10.43 PmRA -43.00
PmDE -16.0 Tycho2 3583-00040-2 Calc delta mag 0.09 Calc coord yes
Tycho2
Tycho2 3583-00040-2 Pflag P RAmdeg 313.02483370 DEmdeg 49.36362890
PmRA -42.6 PmDE -15.9 E RAmdeg 28 E DEmdeg 29
E pmRA 2.7 E pmDE 2.4 EpRAm 1990.48 EpDEm 1990.10
Num 4 Q RAmdeg 0.3 Q DEmdeg 0.5 Q pmRA 0.3
Q pmDE 0.5 BTmag 11.029 E BTmag 0.050 VTmag 10.434
E VTmag 0.043 Prox 14 TYC T HIP
CCDM RAdeg 313.02509778 DEdeg 49.36348778 EpRA 1990 1.72
EpDE 1990 1.75 E RAdeg 29.7 E DEdeg 30.3 Posflg D
Corr 0.0