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Current system
15557-2645
I 977
HD 142456


Nearby doubles
36' : 15575-2710
B 302

39' : 15581-2624
USD 197

39' : 15545-2720
LAF 83AB

48' : 15592-2635
TOK 738

49' : 15561-2556
RST2986

57' : 15589-2607
BU 622AB
Fang

57' : 15562-2548
B 299

61' : 15555-2545
TOK 734

62' : 15592-2606
KSA 78AB

65' : 15542-2746
B 2795AB

65' : 15586-2736
RST1867

66' : 15570-2541
B 855

68' : 15570-2539
UC 3091

69' : 15507-2632
HDS2232

70' : 16002-2611
SEE 255AB

70' : 16007-2706
BRT3027

74' : 15598-2556
KOH 62

76' : 16001-2732
RST1870

76' : 16013-2652
KOH 66AB

78' : 15500-2636
SWR 182

79' : 15573-2529
KOH 57AB

79' : 15564-2803
B 300

85' : 15551-2521
KOH 54

90' : 15536-2520
BU 36AB

93' : 15573-2515
B 301

93' : 15558-2512
KSA 75AB



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

15557-2645 I 977 (HD 142456)

 
 
15h 55m 41.93s -26° 44' 49.3" P.A. 264.00 sep 0.6 mag 7.99,8.48 Sp F7V dist. 75.53 pc (246.38 l.y.)
 
 
Coord 2000 15557-2645 Discov num I   977 Comp Coord arcsec 2000 15 55 41.93 -26 44 49.3
Date first 1910 Date last 2021 Obs 44
Pa first 20 Pa last 264.1 P.A. Now (θ) 264.1°
Sep first 0.4 Sep last 0.628 Sep. Now (ρ) 0.628"
Mag pri 7.99 Mag sec 8.48 delta mag (ΔM) 0.49 Spectral class F7V (yellow-white)
Pri motion ra -016 Sec motion ra
Pri motion dec -075 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 142456 Constellation Scorpius SAO 183933 HIP 78002
Tycho2 6787-00658-1 Gaia DR2 6235266089630115456 HD 142456 GC 21374
ADS 9836 CD CD-2611106 CP CP-26 5545 Distance 75.53
Distance ly 246.38
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)274.5y Periastron (T)1968.88y Semi-major axis (a)0.754a
Eccentricity (e)0.364 Inclination (i)65.8° Longitude of periastron (ω)29.7°
Node (Ω)102.9° Notesn ReferenceSca2013d
Equinox2000 Last observation2010 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 232.2 0.307
2001 235.1 0.320
2002 237.8 0.334
2003 240.2 0.349
2004 242.4 0.363
2005 244.5 0.378
2006 246.4 0.393
2007 248.2 0.408
2008 249.9 0.423
2009 251.4 0.438
2010 252.8 0.453
2011 254.2 0.468
2012 255.4 0.483
2013 256.6 0.497
2014 257.7 0.512
2015 258.8 0.527
2016 259.8 0.541
2017 260.7 0.555
2018 261.6 0.569
2019 262.5 0.583
2020 263.3 0.596
2021 264.1 0.610
2022 264.9 0.623
2023 265.6 0.636
2024 266.3 0.649
2025 266.9 0.661
2026 267.6 0.673
2027 268.2 0.685
2028 268.8 0.697
2029 269.4 0.709
2030 269.9 0.720


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


 
  


wds15557-2645b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)816.6y Periastron (T)1967.58y Semi-major axis (a)1.616a
Eccentricity (e)0.706 Inclination (i)69.7° Longitude of periastron (ω)20.4°
Node (Ω)107.5° Notesn ReferenceSca2013d
Equinox2000 Last observation2010 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 232.9 0.310
2001 235.7 0.325
2002 238.3 0.340
2003 240.6 0.356
2004 242.8 0.372
2005 244.7 0.388
2006 246.5 0.405
2007 248.2 0.422
2008 249.7 0.439
2009 251.1 0.456
2010 252.4 0.473
2011 253.6 0.490
2012 254.8 0.508
2013 255.8 0.525
2014 256.8 0.542
2015 257.8 0.559
2016 258.7 0.576
2017 259.5 0.594
2018 260.3 0.611
2019 261.0 0.628
2020 261.7 0.645
2021 262.4 0.662
2022 263.0 0.678
2023 263.6 0.695
2024 264.2 0.712
2025 264.7 0.728
2026 265.2 0.745
2027 265.7 0.761
2028 266.2 0.778
2029 266.7 0.794
2030 267.1 0.810


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


 
  


wds15557-2645c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 15557-2645 I 977 (HD 142456) : NOTES
 
 
discov_num notes refcode
I 977 Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 1.91 +/- 0.69, 2.57, and 1.13 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sca2013d orb - Scardia, M., Prieur, J.-L., Pansecchi, L., & Argyle, R.W. 2013IAUDS.181....1S
Sca2013d Inf. Circ. 181, 1, 2013
 
 
DISCOVERER
 
 
idgroup discov author
1 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15557-2645 I 977 1996 36 218 0.3 7.99 8.48 F7V NO 155541.93-264449.3
15557-2645 I 977 2008 38 250 0.4 7.99 8.48 F7V NO 155541.93-264449.3
15557-2645 I 977 2010 39 253 0.5 7.99 8.48 F7V NO 155541.93-264449.3
15557-2645 I 977 2014 40 256 0.5 7.99 8.48 F7V NO 155541.93-264449.3
15557-2645 I 977 2018 42 261 0.6 7.99 8.48 F7V NO 155541.93-264449.3
15557-2645 I 977 2019 43 263 0.6 7.99 8.48 F7V NO 155541.93-264449.3
15557-2645 I 977 2021 44 264 0.6 7.99 8.48 F7V NO 155541.93-264449.3

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

 
 
WDS 15557-2645 I 977 (HD 142456) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 15557-2645 I 977 (HD 142456) : MEASURES
 
 
No records found.

 
 
WDS 15557-2645 (HD 142456) : VIRTUAL EYEPIECE
 
 

15557-2645 I 977A mag 7.99 Sp F7V 15557-2645 I 977B sep 0.6 P.A. 263.40 mag 8.48 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 15557-2645 (HD 142456) : ALADIN DSS IMAGE @ 15h 55m 41.93s -26° 44' 49.3"
 
 
 
 
WDS 15557-2645 I 977 (HD 142456) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

15557-2645 I 977 distance=0' 15555-2616 TOK 790Aa,Ab distance=29' 15575-2710 B 302 distance=36' 15581-2624 USD 197 distance=39' 15545-2720 LAF 83AB distance=39' 15545-2720 LAF 83AC distance=39' 15527-2705 USD 89Aa,Ab distance=45' 15592-2635 TOK 738 distance=48' 15561-2556 RST2986 distance=49' 15589-2607 SHT 60Aa,Ab (Fang) distance=57' 15589-2607 BU 622AB (Fang) distance=57' 15562-2548 B 299 distance=57' 15589-2607 KOH 61Ba,Bb distance=58' 15555-2545 TOK 734 distance=61' 15592-2606 KSA 78BC distance=62' 15592-2606 KSA 78AB distance=62' 15542-2746 TDS9685Aa,Ab distance=65' 15542-2746 B 2795AB distance=65' 15586-2736 RST1867 distance=65' 15570-2541 B 855 distance=66' 15570-2539 UC 3091 distance=68' 15507-2632 HDS2232 distance=69' 16002-2611 SEE 255AB distance=70' 16002-2611 SEE 255AC distance=70' 16007-2706 BRT3027 distance=70' 15598-2556 KOH 62 distance=74' 16001-2732 RST1870 distance=76' 16013-2652 KOH 66AB distance=76' 16013-2652 LAF 91AC distance=76' 16013-2652 LAF 91AD distance=76' 16013-2652 LAF 91AE distance=76' 15500-2636 SWR 182 distance=78' 15573-2529 KOH 57AB distance=79' 15573-2529 LAF 87AC distance=79' 15564-2803 B 300 distance=79' 15551-2521 KOH 54 distance=85' 15536-2520 BU 36AB distance=90' 15536-2520 OCC 187Aa,Ab distance=90' 15573-2515 B 301 distance=93' 15558-2512 KSA 75AB distance=93' 15558-2512 KSA 75AC distance=93' 15509-2534 KSA 116AB distance=96' 15598-2804 WSP 17AB (Diwo) distance=97' 15598-2804 WSP 17AC (Diwo) distance=97' 15598-2804 WSP 17AD (Diwo) distance=97' 15598-2804 WSP 17AE (Diwo) distance=97' 15598-2804 WSP 17AF (Diwo) distance=97' 15598-2804 WSP 17AG (Diwo) distance=97' 15598-2804 WSP 17AH (Diwo) distance=97' 15598-2804 WSP 17AI (Diwo) distance=97' 15494-2600 KOH 50AB distance=97' 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 15557-2645 I 977 264 0.6
Show 15555-2616 TOK 790 Aa,Ab 129 0.8 29
Show 15575-2710 B 302 143 0.5 36
Show 15581-2624 USD 197 229 0.4 39
Show 15545-2720 LAF 83 AB 297 5.6 39
Show 15545-2720 LAF 83 AC 175 6.9 39
Show 15527-2705 USD 89 Aa,Ab 45 0.7 45
Show 15592-2635 TOK 738 192 0.7 48
Show 15561-2556 RST2986 49 2.3 49
Show Fang 15589-2607 SHT 60 Aa,Ab 244 2.0 57
Show Fang 15589-2607 BU 622 AB 129 50.4 57
Show 15562-2548 B 299 340 4.0 57
Show 15589-2607 KOH 61 Ba,Bb 331 2.9 58
Show 15555-2545 TOK 734 137 0.4 61
Show 15592-2606 KSA 78 BC 352 0.1 62
Show 15592-2606 KSA 78 AB 329 2.9 62
Show 15542-2746 TDS9685 Aa,Ab 114 0.6 65
Show 15542-2746 B 2795 AB 227 10.0 65
Show 15586-2736 RST1867 80 0.6 65
Show 15570-2541 B 855 236 1.0 66
Show 15570-2539 UC 3091 261 29.6 68
Show 15507-2632 HDS2232 197 0.3 69
Show 16002-2611 SEE 255 AB 2 15.0 70
Show 16002-2611 SEE 255 AC 329 17.9 70
Show 16007-2706 BRT3027 134 5.7 70
Show 15598-2556 KOH 62 85 5.5 74
Show 16001-2732 RST1870 65 0.2 76
Show 16013-2652 KOH 66 AB 151 0.3 76
Show 16013-2652 LAF 91 AC 115 5.9 76
Show 16013-2652 LAF 91 AD 113 6.9 76
Show 16013-2652 LAF 91 AE 330 11.1 76
Show 15500-2636 SWR 182 256 25.0 78
Show 15573-2529 KOH 57 AB 144 0.6 79
Show 15573-2529 LAF 87 AC 117 11.0 79
Show 15564-2803 B 300 325 1.8 79
Show 15551-2521 KOH 54 105 0.2 85
Show 15536-2520 BU 36 AB 273 2.0 90
Show 15536-2520 OCC 187 Aa,Ab -1 0.1 90
Show 15573-2515 B 301 256 0.2 93
Show 15558-2512 KSA 75 AB 319 8.9 93
Show 15558-2512 KSA 75 AC 299 14.5 93
Show 15509-2534 KSA 116 AB 329 0.1 96
Show Diwo 15598-2804 WSP 17 AB 201 11.1 97
Show Diwo 15598-2804 WSP 17 AC 84 13.7 97
Show Diwo 15598-2804 WSP 17 AD 10 16.0 97
Show Diwo 15598-2804 WSP 17 AE 201 3.3 97
Show Diwo 15598-2804 WSP 17 AF 258 7.5 97
Show Diwo 15598-2804 WSP 17 AG 140 17.2 97
Show Diwo 15598-2804 WSP 17 AH 34 20.6 97
Show Diwo 15598-2804 WSP 17 AI 166 22.9 97
Show 15494-2600 KOH 50 AB 116 0.1 97

 
 
WDS 15557-2645 : COMPONENTS
 
 
  A
B pa=263.4°
sep=0.56"
 
 
15557-2645 A
 
 
Componente originario normalizzato AB Name HD 142456 Coord arcsec 2000 155541.93-264449.3 Mag 7.99
Spectral class F7V (yellow-white) PmRA -16.00 PmDE -75.0 SAO 183933
HIP 78002 Tycho2 6787-00658-1 HD 142456 GC 21374
CD CD-2611106 CP CP-26 5545
Tycho2
Tycho2 6787-00658-1 Pflag RAmdeg 238.92465380 DEmdeg -26.74721045
PmRA -16.1 PmDE -79.0 E RAmdeg 4 E DEmdeg 6
E pmRA 1.3 E pmDE 1.3 EpRAm 1991.51 EpDEm 1990.85
Num 12 Q RAmdeg 1.2 Q DEmdeg 0.8 Q pmRA 1.2
Q pmDE 0.8 BTmag 7.942 E BTmag 0.016 VTmag 7.416
E VTmag 0.011 Prox 999 TYC T HIP 78002
CCDM AS RAdeg 238.92469500 DEdeg -26.74702222 EpRA 1990 1.79
EpDE 1990 1.43 E RAdeg 4.4 E DEdeg 5.5 Posflg P
Corr 0.0
SAO
SAO 183933 DelFlag RA1950 PmRA1950 -0.0016
DE1950 PmDE1950 -0.084 Vmag 7.3 SpType F8
Double code Source 70 CatNum 21374 DM CD-2611106
DMcomp BDsup HD 142456 M HD 0
GC 21374 RA1950rad 4.15675808 DE1950rad -0.46427301 PmRA2000 -0.0017
PmDE2000 -0.081
Hipparcos
Catalog H HIP 78002 Proxy H RAhms 15 55 41.93
DEdms -26 44 49.3 Vmag 7.33 VarFlag R Vmag G
RAdeg 238.925 DEdeg -26.747 AstroRef * Plx 14.76
CCDM 15557-2645 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AS
Theta 195 Rho 0.234 HD 142456 BD
CD CD-2611106 CP CP-26 5545 Dm number -2611106 VIred 0.57
SpType F7V R SpType Coord arcsec 2000 155541.93-264449.3
Hipparcos 2
HIP 78002 Sn 55 So 3 Nc 2
RArad 4.1700226928 DErad -0.4668235206 Plx 13.24 PmRA -12.95
PmDE -81.2 E RArad 1 E DErad 0.49 E Plx 1.08
E pmRA 1.12 E pmDE 0.97 Hpmag 7.4538 E Hpmag 0.001
SHp 0.009 VA 0 BV 0.498 E BV 0.011
VI 0.57
CCDM
Ccdm 15557-2645 RComp Comp A Note1
Note2 Discov num DRAs -0.10 DDEs 11.4
R dRAs 41 Year Theta Rho
Obs 2 Vmag 7.8 Sp F8 PmNote *
PmRA -21 PmDE -85 Dm number -2611106 Cat1 CD
Name2 183933 Cat2 SAO HD 142456 M HD
ADS BDS A 9836 M ADS BDS N IDS IDS 15496S2627A
HIC 78002
 
 
15557-2645 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 155541.89-264449.4 Mag 8.48 Calc delta mag 0.49
Calc coord yes
CCDM
Ccdm 15557-2645 RComp Comp B Note1 *
Note2 Discov num I 977 DRAs DDEs
R dRAs Year 1959 Theta 104 Rho 0.5
Obs 15 Vmag 8.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 9836 M ADS BDS N IDS IDS 15496S2627B
HIC 78002