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Current system
20441+3927
ES 1981


Nearby doubles
4' : 20438+3928
SEI1230

9' : 20445+3921
HJ 1572

11' : 20435+3919
SEI1229

18' : 20434+3943
TDT2497

22' : 20457+3917
SEI1241

22' : 20449+3908
SEI1236

26' : 20427+3947
TDT2491

35' : 20434+4001
BRT2272

36' : 20453+3854
SEI1239

37' : 20419+3953
SEI1222

38' : 20416+3950
COU2290

38' : 20461+3858
CRB 11

39' : 20419+3956
SEI1221

41' : 20433+3847
GRV 371

41' : 20430+3850
ES 2053

41' : 20459+3852
COU2294

43' : 20410+3905
HJ 612AB

45' : 20453+4010
COU2293

47' : 20480+3917
A 1434AB

47' : 20454+4011
TDT2518

47' : 20478+3944
GRV 381

49' : 20440+3839
COU2292

49' : 20426+4013
TDT2488

50' : 20440+3838
TDT2506

50' : 20449+3839
ALI 951

51' : 20471+3850
HJ 1575



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.

20441+3927 ES 1981

 
 
20h 44m 05.85s +39° 27' 12.6" P.A. 310.00 sep 4.5 mag 10.30,12.30
 
 
Coord 2000 20441+3927 Discov num ES 1981 Comp Coord arcsec 2000 20 44 05.85 +39 27 12.6
Date first 1922 Date last 2015 Obs 5
Pa first 296 Pa last 309.9 P.A. Now (θ) 309.9°
Sep first 3.0 Sep last 4.521 Sep. Now (ρ) 4.521"
Mag pri 10.30 Mag sec 12.30 delta mag (ΔM) 2 Spectral class
Pri motion ra +014 Sec motion ra -173
Pri motion dec -009 Sec motion dec +136
Notes U (Proper motion indicates non-physical)
rPM=1.075
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 3170-00420-1 Gaia DR2 2063690111669354368
 
 
WDS 20441+3927 ES 1981 : 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Es_1904a MNRAS 64, 238, 1904 (data superceded by MNRAS 65, 710, 1905) 1905MNRAS..65..710E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
20441+3927 ES 1981 1922 1 296 3.0 10.30 12.30 D 204405.85+392712.6
20441+3927 ES 1981 2011 2 309 4.5 10.30 12.30 UD 204405.85+392712.6
20441+3927 ES 1981 2015 5 310 4.5 10.30 12.30 U 204405.85+392712.6

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

 
 
WDS 20441+3927 ES 1981 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20441+3927 ES 1981 : MEASURES
 
 
No records found.

 
 
WDS 20441+3927 : VIRTUAL EYEPIECE
 
 

20441+3927 ES 1981A mag 10.3 20441+3927 ES 1981B sep 4.0 P.A. 317.30 mag 12.3 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 20441+3927 : ALADIN DSS IMAGE @ 20h 44m 05.85s +39° 27' 12.6"
 
 
 
 
WDS 20441+3927 ES 1981 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20441+3927 ES 1981 distance=0' 20438+3928 SEI1230 distance=4' 20445+3921 HJ 1572 distance=9' 20435+3919 SEI1229 distance=11' 20434+3943 TDT2497 distance=18' 20457+3917 SEI1241 distance=22' 20449+3908 SEI1236 distance=22' 20427+3947 TDT2491 distance=26' 20434+4001 BRT2272 distance=35' 20453+3854 SEI1239 distance=36' 20419+3953 SEI1222 distance=37' 20416+3950 COU2290 distance=38' 20461+3858 CRB 11 distance=38' 20419+3956 SEI1221 distance=39' 20433+3847 GRV 371 distance=41' 20430+3850 ES 2053 distance=41' 20459+3852 COU2294 distance=41' 20410+3905 MCA 62Aa,Ab distance=43' 20410+3905 HJ 612AB distance=43' 20453+4010 COU2293 distance=45' 20480+3917 A 1434AB distance=47' 20480+3917 A 1434AB,C distance=47' 20454+4011 TDT2518 distance=47' 20478+3944 GRV 381 distance=47' 20440+3839 COU2292 distance=49' 20426+4013 TDT2488 distance=49' 20440+3838 TDT2506 distance=50' 20449+3839 ALI 951 distance=50' 20471+3850 HJ 1575 distance=51' 20456+4014 TDT2519 distance=51' 20402+3953 MLB 885 distance=52' 20420+4015 A 1433 distance=54' 20436+3834 BRT2232 distance=55' 20396+3908 SEI1210 distance=55' 20481+3958 CVR 231 distance=57' 20489+3919 TDT2558 distance=57' 20490+3925 TDT2560 distance=57' 20436+4024 DAM1256 distance=57' 20454+4023 OSO 133AB distance=59' 20454+4023 OSO 133AC distance=59' 20454+4023 OSO 133AD distance=59' 20454+4023 OSO 133AE distance=59' 20392+3910 MLB 954AB distance=59' 20392+3910 MLB 954AC distance=59' 20432+4026 COU2421 distance=60' 20466+4020 ES 1982 distance=60' 20444+4027 TDT2510 distance=61' 20484+4002 SEI1255AB distance=61' 20405+4010 TOB 196BC distance=61' 20490+3947 STF2731AB distance=61' 20490+3947 HO 596AC distance=61' 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 20441+3927 ES 1981 310 4.5
Show 20438+3928 SEI1230 124 25.3 4
Show 20445+3921 HJ 1572 280 15.6 9
Show 20435+3919 SEI1229 156 19.6 11
Show 20434+3943 TDT2497 317 0.5 18
Show 20457+3917 SEI1241 309 7.1 22
Show 20449+3908 SEI1236 318 27.4 22
Show 20427+3947 TDT2491 275 1.4 26
Show 20434+4001 BRT2272 285 5.1 35
Show 20453+3854 SEI1239 40 26.8 36
Show 20419+3953 SEI1222 77 25.4 37
Show 20416+3950 COU2290 43 0.5 38
Show 20461+3858 CRB 11 272 10.8 38
Show 20419+3956 SEI1221 254 2.0 39
Show 20433+3847 GRV 371 180 65.5 41
Show 20430+3850 ES 2053 223 4.5 41
Show 20459+3852 COU2294 125 0.9 41
Show 20410+3905 MCA 62 Aa,Ab 276 0.1 43
Show 20410+3905 HJ 612 AB 9 48.9 43
Show 20453+4010 COU2293 201 1.1 45
Show 20480+3917 A 1434 AB 178 0.0 47
Show 20480+3917 A 1434 AB,C 256 2.5 47
Show 20454+4011 TDT2518 203 0.7 47
Show 20478+3944 GRV 381 340 35.8 47
Show 20440+3839 COU2292 240 0.3 49
Show 20426+4013 TDT2488 138 0.5 49
Show 20440+3838 TDT2506 23 2.9 50
Show 20449+3839 ALI 951 49 11.1 50
Show 20471+3850 HJ 1575 51 14.9 51
Show 20456+4014 TDT2519 347 1.3 51
Show 20402+3953 MLB 885 72 1.7 52
Show 20420+4015 A 1433 24 0.8 54
Show 20436+3834 BRT2232 269 5.8 55
Show 20396+3908 SEI1210 303 12.0 55
Show 20481+3958 CVR 231 359 9.7 57
Show 20489+3919 TDT2558 191 1.1 57
Show 20490+3925 TDT2560 38 1.1 57
Show 20436+4024 DAM1256 106 9.6 57
Show 20454+4023 OSO 133 AB 114 12.0 59
Show 20454+4023 OSO 133 AC 236 11.7 59
Show 20454+4023 OSO 133 AD 67 21.8 59
Show 20454+4023 OSO 133 AE 8 22.4 59
Show 20392+3910 MLB 954 AB 57 3.1 59
Show 20392+3910 MLB 954 AC 284 109.5 59
Show 20432+4026 COU2421 110 0.3 60
Show 20466+4020 ES 1982 301 3.9 60
Show 20444+4027 TDT2510 157 0.9 61
Show 20484+4002 SEI1255 AB 338 24.4 61
Show 20405+4010 TOB 196 BC 32 23.4 61
Show 20490+3947 STF2731 AB 86 4.1 61
Show 20490+3947 HO 596 AC 178 18.0 61

 
 
WDS 20441+3927 : COMPONENTS
 
 
  A
B pa=317.3°
sep=3.95"
 
 
20441+3927 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 204405.85+392712.6 Mag 10.3 PmRA 14.00
PmDE -9.0 Tycho2 3170-00420-1
Tycho2
Tycho2 3170-00420-1 Pflag RAmdeg 311.02438451 DEmdeg 39.45350663
PmRA -2.8 PmDE -2.6 E RAmdeg 17 E DEmdeg 17
E pmRA 1.1 E pmDE 1.1 EpRAm 1988.68 EpDEm 1989.09
Num 7 Q RAmdeg 2.1 Q DEmdeg 1.3 Q pmRA 2.2
Q pmDE 1.4 BTmag 10.518 E BTmag 0.029 VTmag 10.044
E VTmag 0.027 Prox 999 TYC T HIP
CCDM RAdeg 311.02439972 DEdeg 39.45351083 EpRA 1990 1.74
EpDE 1990 1.72 E RAdeg 17.7 E DEdeg 16.5 Posflg
Corr 0.0
 
 
20441+3927 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204405.62+392715.5 Mag 12.3 PmRA -173.00
PmDE 136.0 Calc delta mag 2 Calc coord yes