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Doubles in session


Current system
18305-2848
HDS 2624
HD 170415


Nearby doubles
25' : 18319-2831
RST2062

33' : 18292-2916
B 2450

35' : 18279-2848
RST2056

37' : 18329-2906
SKF2130

38' : 18292-2921
B 2451

43' : 18281-2917
AAQ 3

43' : 18335-2832
BRT3073

47' : 18296-2803
SKF2128

58' : 18348-2837
B 395

61' : 18325-2753
SKF2131

63' : 18271-2930
B 2447

68' : 18328-2747
KPP 417

70' : 18291-2955
HDS2617

70' : 18311-2738
J 1632

71' : 18359-2849
HJ 5051AB

71' : 18278-2949
RAG 2

81' : 18264-2749
B 2865

83' : 18259-2752
RST2051

85' : 18334-3004
I 1370

90' : 18261-2740
J 2211AB

92' : 18244-2932
RSS 31

92' : 18346-2734
I 1026AB

92' : 18275-2725
FIN 267

93' : 18287-3017
BRT3072

94' : 18286-2717
J 2214

95' : 18289-2716
OCC 185



Selections
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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.

18305-2848 HDS 2624 (HD 170415)

 
 
18h 30m 31.02s -28° 47' 42.9" P.A. 230.00 sep 0.1 mag 8.47,8.71 Sp A1IV/V dist. 158.98 pc (518.59 l.y.)
 
 
Coord 2000 18305-2848 Discov num HDS2624 Comp Coord arcsec 2000 18 30 31.02 -28 47 42.9
Date first 1991 Date last 2021 Obs 10
Pa first 197 Pa last 229.8 P.A. Now (θ) 226.3°
Sep first 0.1 Sep last 0.125 Sep. Now (ρ) 0.141"
Mag pri 8.47 Mag sec 8.71 delta mag (ΔM) 0.24 Spectral class A1IV/V (white)
Pri motion ra -008 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 170415 Constellation Sagittarius SAO 186892 HIP 90715
Tycho2 6869-00432-1 Gaia DR2 4048486716386440192 HD 170415 GC 25243
CD CD-2814648 CP CP-28 6576 Distance 158.98 Distance ly 518.59
 
 
ORBITAL ELEMENTS
 
 
Period (P)42.93y± 10.94 Periastron (T)2007.53y± 1.05 Semi-major axis (a)0.0979a± 0.0211
Eccentricity (e)0.531± 0.104 Inclination (i)144.5°± 33.2 Longitude of periastron (ω)14°± 24.7
Node (Ω)42.3°± 22.1 Notes ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 157.5 0.085
2001 149.1 0.077
2002 138.7 0.070
2003 125.9 0.062
2004 110.1 0.056
2005 91.1 0.052
2006 69.1 0.049
2007 44.7 0.047
2008 18.0 0.045
2009 349.6 0.044
2010 322.9 0.048
2011 301.6 0.055
2012 285.8 0.064
2013 274.1 0.074
2014 265.1 0.084
2015 258.0 0.093
2016 252.1 0.102
2017 247.1 0.109
2018 242.8 0.117
2019 238.9 0.123
2020 235.4 0.129
2021 232.2 0.133
2022 229.2 0.138
2023 226.3 0.141
2024 223.6 0.144
2025 220.9 0.146
2026 218.4 0.148
2027 215.8 0.148
2028 213.3 0.149
2029 210.8 0.148
2030 208.3 0.147


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


 
  


wds18305-2848a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18305-2848 HDS 2624 (HD 170415) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
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
18305-2848 HDS2624 1991 1 197 0.1 8.47 8.71 A1IV/V 183031.02-284742.9
18305-2848 HDS2624 2009 3 161 0.0 8.47 8.71 A1IV/V 183031.02-284742.9
18305-2848 HDS2624 2014 5 79 0.1 8.47 8.71 A1IV/V O 183031.02-284742.9
18305-2848 HDS2624 2015 7 254 0.1 8.47 8.71 A1IV/V O 183031.02-284742.9
18305-2848 HDS2624 2017 8 245 0.1 8.47 8.71 A1IV/V O 183031.02-284742.9
18305-2848 HDS2624 2018 9 241 0.1 8.47 8.71 A1IV/V O 183031.02-284742.9
18305-2848 HDS2624 2021 10 230 0.1 8.47 8.71 A1IV/V O 183031.02-284742.9

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

 
 
WDS 18305-2848 HDS 2624 (HD 170415) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18305-2848 HDS 2624 (HD 170415) : MEASURES
 
 
No records found.

 
 
WDS 18305-2848 (HD 170415) : VIRTUAL EYEPIECE
 
 

18305-2848 HDS2624A mag 8.47 Sp A1IV/V 18305-2848 HDS2624B sep 0.1 P.A. 226.00 mag 8.71 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 18305-2848 (HD 170415) : ALADIN DSS IMAGE @ 18h 30m 31.02s -28° 47' 42.9"
 
 
 
 
WDS 18305-2848 HDS 2624 (HD 170415) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18305-2848 HDS2624 distance=0' 18319-2831 RST2062 distance=25' 18292-2916 B 2450 distance=33' 18279-2848 RST2056 distance=35' 18329-2906 SKF2130 distance=37' 18292-2921 B 2451 distance=38' 18281-2917 AAQ 3 distance=43' 18335-2832 BRT3073 distance=43' 18296-2803 SKF2128 distance=47' 18312-2757 RST2060Ba,Bb distance=52' 18348-2837 B 395 distance=58' 18325-2753 SKF2131 distance=61' 18271-2930 B 2447 distance=63' 18328-2747 KPP 417 distance=68' 18359-2849 DOO 71CD distance=69' 18291-2955 HDS2617 distance=70' 18311-2738 J 1632 distance=70' 18359-2849 HJ 5051AB distance=71' 18359-2849 HJ 5051AC distance=71' 18278-2949 RAG 2 distance=71' 18264-2749 B 2865 distance=81' 18259-2752 RST2051 distance=83' 18334-3004 I 1370 distance=85' 18261-2740 J 2211AB distance=90' 18261-2740 J 2211AC distance=90' 18244-2932 RSS 31 distance=92' 18346-2734 I 1027CD distance=92' 18346-2734 I 1026AB distance=92' 18346-2734 I 1026A,CD distance=92' 18346-2734 TOK 422Aa,Ab distance=92' 18275-2725 FIN 267 distance=92' 18287-3017 BRT3072 distance=93' 18286-2717 J 2214 distance=94' 18289-2716 OCC 185 distance=95' 18263-3008 BRT3071 distance=98' 18245-2947 B 2446AB distance=99' 18245-2947 BIL 7Aa,Ab distance=99' 18232-2825 HDS2601 distance=99' 18257-2726 OCC 186 distance=103' 18256-2724 COO 225AB distance=106' 18256-2724 SIN 109AC distance=106' 18386-2850 TDT 971 distance=107' 18256-3013 SEE 352 distance=107' 18239-2746 VVV 4 distance=108' 18307-2700 RST2059 distance=108' 18267-3024 TOK 421 distance=109' 18255-3015 B 939 distance=110' 18259-2713 RST2050 distance=114' 18219-2913 RST2048 distance=117' 18360-3023 SKF2024 distance=120' 18352-3030 RST2066 distance=121' 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 18305-2848 HDS2624 230 0.1
Show 18319-2831 RST2062 3 0.8 25
Show 18292-2916 B 2450 347 14.0 33
Show 18279-2848 RST2056 27 2.6 35
Show 18329-2906 SKF2130 134 3.0 37
Show 18292-2921 B 2451 244 9.3 38
Show 18281-2917 AAQ 3 74 3.5 43
Show 18335-2832 BRT3073 281 3.9 43
Show 18296-2803 SKF2128 291 4.8 47
Show 18312-2757 RST2060 Ba,Bb 8 0.6 52
Show 18348-2837 B 395 278 1.3 58
Show 18325-2753 SKF2131 47 4.7 61
Show 18271-2930 B 2447 222 8.8 63
Show 18328-2747 KPP 417 57 5.0 68
Show 18359-2849 DOO 71 CD 34 4.3 69
Show 18291-2955 HDS2617 25 0.8 70
Show 18311-2738 J 1632 165 5.3 70
Show 18359-2849 HJ 5051 AB 237 9.3 71
Show 18359-2849 HJ 5051 AC 296 91.6 71
Show 18278-2949 RAG 2 265 11.1 71
Show 18264-2749 B 2865 298 11.4 81
Show 18259-2752 RST2051 116 1.4 83
Show 18334-3004 I 1370 187 3.8 85
Show 18261-2740 J 2211 AB 49 5.7 90
Show 18261-2740 J 2211 AC 196 11.4 90
Show 18244-2932 RSS 31 169 44.7 92
Show 18346-2734 I 1027 CD 69 1.9 92
Show 18346-2734 I 1026 AB 41 9.0 92
Show 18346-2734 I 1026 A,CD 145 36.1 92
Show 18346-2734 TOK 422 Aa,Ab 102 0.1 92
Show 18275-2725 FIN 267 343 4.9 92
Show 18287-3017 BRT3072 162 5.3 93
Show 18286-2717 J 2214 119 5.3 94
Show 18289-2716 OCC 185 -1 0.1 95
Show 18263-3008 BRT3071 323 3.5 98
Show 18245-2947 B 2446 AB 223 9.3 99
Show 18245-2947 BIL 7 Aa,Ab 0.1 99
Show 18232-2825 HDS2601 221 0.2 99
Show 18257-2726 OCC 186 -1 0.1 103
Show 18256-2724 COO 225 AB 359 5.9 106
Show 18256-2724 SIN 109 AC 89 69.0 106
Show 18386-2850 TDT 971 163 0.5 107
Show 18256-3013 SEE 352 70 3.4 107
Show 18239-2746 VVV 4 166 95.5 108
Show 18307-2700 RST2059 5 1.9 108
Show 18267-3024 TOK 421 288 0.1 109
Show 18255-3015 B 939 190 5.0 110
Show 18259-2713 RST2050 77 2.0 114
Show 18219-2913 RST2048 233 0.3 117
Show 18360-3023 SKF2024 74 22.4 120
Show 18352-3030 RST2066 312 0.9 121

 
 
WDS 18305-2848 : COMPONENTS
 
 
  A
B pa=226.0°
sep=0.12"
 
 
18305-2848 A
 
 
Componente originario normalizzato AB Name HD 170415 Coord arcsec 2000 183031.02-284742.9 Mag 8.47
Spectral class A1IV/V (white) PmRA -8.00 PmDE -16.0 SAO 186892
HIP 90715 Tycho2 6869-00432-1 HD 170415 GC 25243
CD CD-2814648 CP CP-28 6576
Tycho2
Tycho2 6869-00432-1 Pflag RAmdeg 277.62920672 DEmdeg -28.79529625
PmRA -9.6 PmDE -18.0 E RAmdeg 4 E DEmdeg 5
E pmRA 0.9 E pmDE 1.0 EpRAm 1991.39 EpDEm 1991.22
Num 16 Q RAmdeg 1.5 Q DEmdeg 0.8 Q pmRA 1.6
Q pmDE 0.7 BTmag 8.046 E BTmag 0.016 VTmag 7.807
E VTmag 0.011 Prox 599 TYC T HIP 90715
CCDM AB RAdeg 277.62923194 DEdeg -28.79525472 EpRA 1990 1.80
EpDE 1990 1.74 E RAdeg 4.2 E DEdeg 5.4 Posflg P
Corr -0.1
SAO
SAO 186892 DelFlag RA1950 PmRA1950 0.0004
DE1950 PmDE1950 -0.017 Vmag 7.5 SpType A2
Double code Source 70 CatNum 25243 DM CD-2814648
DMcomp BDsup HD 170415 M HD 0
GC 25243 RA1950rad 4.83171277 DE1950rad -0.503181 PmRA2000 0.0003
PmDE2000 -0.017
Hipparcos
Catalog H HIP 90715 Proxy H RAhms 18 30 31.02
DEdms -28 47 42.9 Vmag 7.76 VarFlag R Vmag H
RAdeg 277.629 DEdeg -28.7953 AstroRef * Plx 6.84
CCDM 18305-2848 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 197 Rho 0.138 HD 170415 BD
CD CD-2814648 CP CP-28 6576 Dm number -2814648 VIred 0.25
SpType A1IV/V R SpType Coord arcsec 2000 183031.02-284742.9
Hipparcos 2
HIP 90715 Sn 55 So 3 Nc 2
RArad 4.8455441993 DErad -0.5025719561 Plx 6.29 PmRA -7.21
PmDE -16.2 E RArad 1.02 E DErad 0.58 E Plx 1.1
E pmRA 1.28 E pmDE 0.67 Hpmag 7.8309 E Hpmag 0.0015
SHp 0.013 VA 0 BV 0.214 E BV 0.011
VI 0.24
CCDM
Ccdm 18305-2848 RComp Comp A Note1
Note2 Discov num DRAs 1.02 DDEs 17.0
R dRAs 82 Year Theta Rho
Obs 2 Vmag 8.5 Sp A1 PmNote *
PmRA -8 PmDE -16 Dm number -2814648 Cat1 CD
Name2 186892 Cat2 SAO HD 170415 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 90715
 
 
18305-2848 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 183031.01-284743.0 Mag 8.71 Calc delta mag 0.24
Calc coord yes
CCDM
Ccdm 18305-2848 RComp Comp B Note1
Note2 Discov num HDS DRAs 1.01 DDEs 16.9
R dRAs 82 Year 1991 Theta 197 Rho 0.1
Obs 1 Vmag 8.7 Sp PmNote *
PmRA -8 PmDE -16 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 90715