stampa
Login

Filter only those doubles you can observe? Yes, you can!
Register here


Search



Actions
Advanced Search
Go to Simbad
New report
New measure
Login


Computed Lists
Populars
Latest Populars
Doubles in session


Current system
20406+1539
HDS 2947
HD 197039


Nearby doubles
16' : 20413+1551
UC 4257

21' : 20393+1529
HEI 77

21' : 20406+1559
BPM2225

22' : 20396+1555
BU 298AB
Sualocin

25' : 20391+1550
BU 288AB

25' : 20391+1526
BPM2219

36' : 20415+1611
J 2319

36' : 20402+1503
UC 4251

42' : 20435+1540
GWP2990

43' : 20413+1458
NSN 4

46' : 20436+1537
J 3108

46' : 20388+1500
BU 435

49' : 20434+1512
UC 4270

49' : 20375+1557
BPM2214

50' : 20434+1604
HJ 1564

53' : 20411+1631
FMR 161

54' : 20435+1504
CIA 11

55' : 20383+1623
BPM2216

56' : 20391+1448
LEP 95

60' : 20366+1553
BPM2207

64' : 20446+1605
BPM2245

66' : 20374+1626
BPM2212

67' : 20427+1440
BPM2233

68' : 20448+1512
BPM2253

68' : 20444+1500
BPM2243

72' : 20437+1635
BPM2237



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.

20406+1539 HDS 2947 (HD 197039)

 
 
20h 40m 35.25s +15° 38' 35.3" P.A. 111.00 sep 0.2 mag 7.27,8.14 Sp F5 dist. 71.63 pc (233.66 l.y.)
 
 
Coord 2000 20406+1539 Discov num HDS2947 Comp Coord arcsec 2000 20 40 35.25 +15 38 35.3
Date first 1991 Date last 2021 Obs 38
Pa first 101 Pa last 110.6 P.A. Now (θ) 108.1°
Sep first 0.2 Sep last 0.196 Sep. Now (ρ) 0.222"
Mag pri 7.27 Mag sec 8.14 delta mag (ΔM) 0.87 Spectral class F5 (yellow-white)
Pri motion ra +094 Sec motion ra
Pri motion dec +045 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197039 Constellation Delphinus SAO 106369 HIP 102029
Tycho2 1634-00576-1 Gaia DR2 1810621567612258048 HD 197039 GC 28807
BD BD+15 4227 Distance 71.63 Distance ly 233.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)17.688y Periastron (T)2014.815y Semi-major axis (a)0.139a
Eccentricity (e)0.749 Inclination (i)104.3° Longitude of periastron (ω)158.3°
Node (Ω)101.6° Notes ReferenceTok2020g
Equinox2000 Last observation2019 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 122.1 0.093
2001 116.8 0.130
2002 113.8 0.160
2003 111.6 0.185
2004 109.9 0.204
2005 108.5 0.218
2006 107.2 0.227
2007 106.0 0.231
2008 104.7 0.229
2009 103.5 0.221
2010 102.1 0.207
2011 100.4 0.184
2012 98.1 0.152
2013 94.2 0.107
2014 80.2 0.040
2015 277.7 0.037
2016 176.3 0.023
2017 129.5 0.064
2018 120.1 0.105
2019 115.7 0.140
2020 113.0 0.168
2021 111.0 0.191
2022 109.4 0.209
2023 108.1 0.222
2024 106.8 0.229
2025 105.6 0.231
2026 104.4 0.227
2027 103.1 0.217
2028 101.6 0.201
2029 99.8 0.175
2030 97.2 0.140


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds20406%2B1539b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20406+1539 HDS 2947 (HD 197039) : NOTES
 
 
discov_num notes refcode
HDS2947 New observations of this object indicate that the orbit is eccentric,
and that we observed the system near periastron (and below the
diffraction limit of the DCT). The orbital elements obtained confirm
that picture, yielding a total mass of 3.4 +/- 0.5 Msun. The composite
spectral type is F5 and the system has a magnitude difference of about
1, so that we might suggest that the individual spectral types are F4
and F9. If so, then the total mass would be on the order of 2.5 Msun,
which is about 2 sigma lower than the value implied by the current
orbital elements and the parallax of 13.96 +/- 0.55 mas. However,
because there is only one point near periastron at the moment, the
orbital elements will of course be modified with time. Hor2015b
 
 
REFERENCES
 
 
refcode metd author reference
Hor2015b S j Horch, E.P., van Belle, G.T., Davidson, J.W., Jr., Ciastko, L.A., Everett, M.E., & 2015AJ....150..151H
Hor2015b Bjorkman, K.S.
Hor2015b AJ 150, 151, 2015
Tok2020g orb - Tokovinin, A. 2020IAUDS.201....1A
Tok2020g Inf. Circ. 201, 1, 2020
 
 
DISCOVERER
 
 
idgroup discov author
1 HDS Hipparcos Double Star (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20406+1539 HDS2947 2006 18 107 0.2 7.27 8.14 F5 D 204035.25+153835.3
20406+1539 HDS2947 2008 21 105 0.2 7.27 8.14 F5 D 204035.25+153835.3
20406+1539 HDS2947 2014 20 107 0.0 7.27 8.14 F5 204035.25+153835.3
20406+1539 HDS2947 2015 21 41 0.0 7.27 8.14 F5 204035.25+153835.3
20406+1539 HDS2947 2017 23 122 0.1 7.27 8.14 F5 N 204035.25+153835.3
20406+1539 HDS2947 2018 24 118 0.1 7.27 8.14 F5 N 204035.25+153835.3
20406+1539 HDS2947 2019 25 114 0.2 7.27 8.14 F5 N 204035.25+153835.3
20406+1539 HDS2947 2020 36 112 0.2 7.27 8.14 F5 N 204035.25+153835.3
20406+1539 HDS2947 2021 38 111 0.2 7.27 8.14 F5 NO 204035.25+153835.3

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

 
 
WDS 20406+1539 HDS 2947 (HD 197039) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20406+1539 HDS 2947 (HD 197039) : MEASURES
 
 
No records found.

 
 
WDS 20406+1539 (HD 197039) : VIRTUAL EYEPIECE
 
 

20406+1539 HDS2947A mag 7.27 Sp F5 20406+1539 HDS2947B sep 0.2 P.A. 111.30 mag 8.14 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 20406+1539 (HD 197039) : ALADIN DSS IMAGE @ 20h 40m 35.25s +15° 38' 35.3"
 
 
 
 
WDS 20406+1539 HDS 2947 (HD 197039) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20406+1539 HDS2947 distance=0' 20413+1551 UC 4257 distance=16' 20393+1529 HEI 77 distance=21' 20406+1559 BPM2225 distance=21' 20396+1555 WCK 2Aa,Ab (Sualocin) distance=22' 20396+1555 BU 298AB (Sualocin) distance=22' 20396+1555 HJ 1554AC (Sualocin) distance=22' 20396+1555 BU 298AD (Sualocin) distance=22' 20396+1555 BU 298AE (Sualocin) distance=22' 20396+1555 BU 298AF (Sualocin) distance=22' 20396+1555 CIA 23Ab1,2 distance=22' 20391+1550 BU 288AB distance=25' 20391+1550 BU 288AC distance=25' 20391+1550 BU 288AD distance=25' 20391+1550 BU 288AE distance=25' 20391+1526 BPM2219 distance=25' 20415+1611 J 2319 distance=36' 20402+1503 UC 4251 distance=36' 20435+1540 GWP2990 distance=42' 20413+1458 NSN 4 distance=43' 20436+1537 J 3108 distance=46' 20388+1500 BU 435 distance=46' 20434+1512 UC 4270 distance=49' 20375+1557 BPM2214 distance=49' 20434+1604 HJ 1564 distance=50' 20411+1631 FMR 161 distance=53' 20435+1504 CIA 11 distance=54' 20383+1623 BPM2216 distance=55' 20391+1448 LEP 95 distance=56' 20366+1553 BPM2207 distance=60' 20446+1605 BPM2245 distance=64' 20374+1626 BPM2212 distance=66' 20427+1440 BPM2233 distance=67' 20448+1512 BPM2253 distance=68' 20444+1500 BPM2243 distance=68' 20437+1635 BPM2237 distance=72' 20357+1522 ARY 85 distance=73' 20457+1537 BPM2255 distance=75' 20438+1440 J 1345 distance=76' 20375+1436 BU 151AB (Rotanev) distance=77' 20375+1436 HJ 5545AB,C distance=77' 20375+1436 STF2704AB,D distance=77' 20375+1436 LBZ 1AB,E distance=77' 20368+1444 STF2703AB distance=78' 20368+1444 STF2703AD distance=78' 20368+1444 STF2703AC distance=78' 20368+1444 STF2703BC distance=78' 20351+1533 J 566 distance=79' 20446+1635 BPM2248AB distance=81' 20446+1635 BPM2249AC distance=81' 20446+1635 BPM2250BC distance=82' 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 20406+1539 HDS2947 111 0.2
Show 20413+1551 UC 4257 208 20.3 16
Show 20393+1529 HEI 77 41 1.4 21
Show 20406+1559 BPM2225 57 22.7 21
Show Sualocin 20396+1555 WCK 2 Aa,Ab 289 0.1 22
Show Sualocin 20396+1555 BU 298 AB 233 35.5 22
Show Sualocin 20396+1555 HJ 1554 AC 277 48.4 22
Show Sualocin 20396+1555 BU 298 AD 160 45.4 22
Show Sualocin 20396+1555 BU 298 AE 304 57.2 22
Show Sualocin 20396+1555 BU 298 AF 118 72.2 22
Show 20396+1555 CIA 23 Ab1,2 250 0.0 22
Show 20391+1550 BU 288 AB 154 5.2 25
Show 20391+1550 BU 288 AC 122 39.9 25
Show 20391+1550 BU 288 AD 146 28.8 25
Show 20391+1550 BU 288 AE 33 23.3 25
Show 20391+1526 BPM2219 170 85.3 25
Show 20415+1611 J 2319 192 7.5 36
Show 20402+1503 UC 4251 291 52.0 36
Show 20435+1540 GWP2990 291 26.5 42
Show 20413+1458 NSN 4 71 4.6 43
Show 20436+1537 J 3108 196 6.3 46
Show 20388+1500 BU 435 119 3.1 46
Show 20434+1512 UC 4270 2 52.2 49
Show 20375+1557 BPM2214 90 69.1 49
Show 20434+1604 HJ 1564 41 11.4 50
Show 20411+1631 FMR 161 322 27.8 53
Show 20435+1504 CIA 11 334 0.0 54
Show 20383+1623 BPM2216 177 102.9 55
Show 20391+1448 LEP 95 151 8.5 56
Show 20366+1553 BPM2207 49 43.4 60
Show 20446+1605 BPM2245 198 112.1 64
Show 20374+1626 BPM2212 324 100.7 66
Show 20427+1440 BPM2233 190 72.4 67
Show 20448+1512 BPM2253 241 75.8 68
Show 20444+1500 BPM2243 169 106.5 68
Show 20437+1635 BPM2237 49 108.4 72
Show 20357+1522 ARY 85 321 83.6 73
Show 20457+1537 BPM2255 85 72.3 75
Show 20438+1440 J 1345 278 3.5 76
Show Rotanev 20375+1436 BU 151 AB 218 0.2 77
Show 20375+1436 HJ 5545 AB,C 139 12.1 77
Show 20375+1436 STF2704 AB,D 317 47.8 77
Show 20375+1436 LBZ 1 AB,E 271 112.6 77
Show 20368+1444 STF2703 AB 290 25.1 78
Show 20368+1444 STF2703 AD 347 84.7 78
Show 20368+1444 STF2703 AC 234 77.8 78
Show 20368+1444 STF2703 BC 215 67.0 78
Show 20351+1533 J 566 119 4.1 79
Show 20446+1635 BPM2248 AB 95 107.8 81
Show 20446+1635 BPM2249 AC 29 107.0 81
Show 20446+1635 BPM2250 BC 332 117.2 82

 
 
WDS 20406+1539 : COMPONENTS
 
 
  A
B pa=111.3°
sep=0.19"
 
 
20406+1539 A
 
 
Componente originario normalizzato AB Name HD 197039 Coord arcsec 2000 204035.25+153835.3 Mag 7.27
Spectral class F5 (yellow-white) PmRA 94.00 PmDE 45.0 SAO 106369
HIP 102029 Tycho2 1634-00576-1 HD 197039 GC 28807
BD BD+15 4227
Tycho2
Tycho2 1634-00576-1 Pflag RAmdeg 310.14712135 DEmdeg 15.64325062
PmRA 91.4 PmDE 46.9 E RAmdeg 4 E DEmdeg 5
E pmRA 0.8 E pmDE 0.9 EpRAm 1991.18 EpDEm 1990.76
Num 19 Q RAmdeg 1.0 Q DEmdeg 1.0 Q pmRA 1.1
Q pmDE 0.9 BTmag 7.302 E BTmag 0.015 VTmag 6.818
E VTmag 0.010 Prox 999 TYC T HIP 102029
CCDM AB RAdeg 310.14690194 DEdeg 15.64313889 EpRA 1990 1.69
EpDE 1990 1.43 E RAdeg 4.0 E DEdeg 4.5 Posflg P
Corr -0.1
SAO
SAO 106369 DelFlag RA1950 PmRA1950 0.006
DE1950 PmDE1950 0.052 Vmag 6.8 SpType F5
Double code Source 70 CatNum 28807 DM BD+15 4227
DMcomp BDsup HD 197039 M HD 0
GC 28807 RA1950rad 5.4029191 DE1950rad 0.26990129 PmRA2000 0.0061
PmDE2000 0.05
Hipparcos
Catalog H HIP 102029 Proxy H RAhms 20 40 35.25
DEdms +15 38 35.3 Vmag 6.76 VarFlag R Vmag H
RAdeg 310.147 DEdeg 15.6431 AstroRef * Plx 14.36
CCDM 20406+1539 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 101 Rho 0.22 HD 197039 BD BD+15 4227
CD CP Dm number +15 4227 VIred 0.53
SpType F5 R SpType Coord arcsec 2000 204035.25+153835.3
Hipparcos 2
HIP 102029 Sn 55 So 3 Nc 2
RArad 5.4130843958 DErad 0.2730242412 Plx 13.96 PmRA 93.43
PmDE 44.47 E RArad 0.43 E DErad 0.34 E Plx 0.55
E pmRA 0.53 E pmDE 0.38 Hpmag 6.8665 E Hpmag 0.0008
SHp 0.006 VA 0 BV 0.458 E BV 0.01
VI 0.53
CCDM
Ccdm 20406+1539 RComp Comp A Note1
Note2 Discov num DRAs -0.70 DDEs -24.3
R dRAs 82 Year Theta Rho
Obs 2 Vmag 7.3 Sp F5 PmNote *
PmRA 98 PmDE 42 Dm number +15 4227 Cat1 BD
Name2 +15 2269 Cat2 AGK2/3 HD 197039 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 102029
 
 
20406+1539 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204035.26+153835.2 Mag 8.14 Calc delta mag 0.87
Calc coord yes
CCDM
Ccdm 20406+1539 RComp Comp B Note1
Note2 Discov num HDS DRAs -0.68 DDEs -24.3
R dRAs 82 Year 1991 Theta 101 Rho 0.2
Obs 1 Vmag 8.1 Sp PmNote *
PmRA 85 PmDE 50 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 102029