10074-1943 BU 218 (HD 87840)

 
 
10h 07m 22.22s -19° 42' 31.2" P.A. 146.00 sep 0.4 mag 8.16,8.21 Sp A2IV dist. 207.9 pc (678.17 l.y.)
 
 
Coord 2000 10074-1943 Discov num BU  218 Comp Coord arcsec 2000 10 07 22.22 -19 42 31.2
Date first 1875 Date last 2017 Obs 42
Pa first 123 Pa last 145.7 P.A. Now (θ) 145.7°
Sep first 1.0 Sep last 0.435 Sep. Now (ρ) 0.435"
Mag pri 8.16 Mag sec 8.21 delta mag (ΔM) 0.05 Spectral class A2IV (white)
Pri motion ra -034 Sec motion ra -034
Pri motion dec +018 Sec motion dec +018
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 87840 Constellation Hydra SAO 155744 HIP 49587
Tycho2 6054-00753-1 Gaia DR2 5667772644917800192 HD 87840 ADS 7647
BD BD-19 2918 Distance 207.9 Distance ly 678.17
 
 
ORBITAL ELEMENTS
 
 
Period (P)1449.2807y± 724.0248 Periastron (T)1785.9264y± 253.8953 Semi-major axis (a)2.69076a± 1.80641
Eccentricity (e)0.78317± 0.1884 Inclination (i)86.131°± 9.298 Longitude of periastron (ω)295.406°± 38.833
Node (Ω)116.563°± 5.291 Notes ReferenceIzm2019
Equinox Last observation1998 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 140.8 0.483
2001 141.1 0.478
2002 141.5 0.474
2003 141.8 0.469
2004 142.2 0.465
2005 142.5 0.460
2006 142.9 0.456
2007 143.2 0.451
2008 143.6 0.447
2009 144.0 0.442
2010 144.4 0.438
2011 144.8 0.433
2012 145.2 0.429
2013 145.6 0.424
2014 146.0 0.420
2015 146.5 0.416
2016 146.9 0.411
2017 147.4 0.407
2018 147.8 0.403
2019 148.3 0.398
2020 148.8 0.394
2021 149.3 0.390
2022 149.8 0.386
2023 150.3 0.381
2024 150.8 0.377
2025 151.3 0.373
2026 151.9 0.369
2027 152.4 0.365
2028 153.0 0.361
2029 153.6 0.357
2030 154.2 0.353


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


 
  


wds10074-1943a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 10074-1943 BU 218 (HD 87840) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
10074-1943 BU 218 1998 40 138 0.5 8.16 8.21 A2IV D 100722.22-194231.2
10074-1943 BU 218 2017 41 146 0.4 8.16 8.21 A2IV 100722.22-194231.2

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

 
 
WDS 10074-1943 BU 218 (HD 87840) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 10074-1943 BU 218 (HD 87840) : MEASURES
 
 
No records found.

 
 
WDS 10074-1943 (HD 87840) : VIRTUAL EYEPIECE
 
 

10074-1943 BU 218A mag 8.16 Sp A2IV 10074-1943 BU 218B sep 0.4 P.A. 147.30 mag 8.21 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 10074-1943 (HD 87840) : ALADIN DSS IMAGE @ 10h 07m 22.22s -19° 42' 31.2"
 
 
 
 
WDS 10074-1943 BU 218 (HD 87840) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

10074-1943 BU 218 distance=0' 10084-1945 BU 911AB distance=15' 10084-1945 BU 911AC distance=15' 10074-2000 ARA 664 distance=18' 10066-1926 GWP1292 distance=21' 10066-1919 S 607AB distance=26' 10066-1919 TOK 66AC distance=26' 10066-1919 TOK 66Ba,Bb distance=27' 10073-2011 DON1087 distance=29' 10113-1949 GWP1309 distance=56' 10059-1851 ARA 408 distance=56' 10100-1901 GWP1305 distance=56' 10111-1922 XMI 97 distance=57' 10082-2038 LDS3958 distance=58' 10056-2038 ARA1082 distance=62' 10114-2016 UC 1891AB distance=67' 10100-1845 UC 1887 distance=69' 10057-2049 ARA1083 distance=70' 10027-2010 DAM 715 distance=72' 10025-2006 ARA 662 distance=73' 10022-1946 B 781 distance=74' 10093-2051 ARA1084 distance=75' 10059-2054 LDS3955 distance=75' 10021-1921 WIS 165 distance=78' 10031-1837 GWP1276 distance=89' 10121-1837 SUB 4 distance=95' 10045-1814 RST3676 distance=98' 10124-1832 ARA 410 distance=101' 10134-1847 LDS3965 distance=103' 10027-2103 DON 383 distance=104' 10040-1806 BU 1072AB distance=108' 10040-1806 SHJ 110AC distance=108' 10040-1806 BU 1072BC distance=108' 10146-2028 ARA 665 distance=111' 10014-1830 KPP 209 distance=112' 09593-1956 LDS 294 distance=115' 10157-1951 ARA 666BC distance=118' 10157-1951 ARA 666AB distance=118' 10157-1951 ARA 666AC distance=118' 10063-1735 GWP1288 distance=129' 10008-1809 ARA 220 distance=133' 10140-1807 DAM2161 distance=134' 09585-2035 ARA1081 distance=135' 10006-1807 RST2664 distance=136' 10007-2121 DON 380 distance=136' 10166-2029 B 788 distance=138' 10152-1817 UC 1901 distance=141' 10143-1802 HU 459 distance=141' 10157-1825 HLD 100 distance=142' 09595-1813 GWP1266 distance=143' 10168-2040 HLD 101 distance=145' 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 10074-1943 BU 218 146 0.4
Show 10084-1945 BU 911 AB 315 4.1 15
Show 10084-1945 BU 911 AC 54 83.4 15
Show 10074-2000 ARA 664 2 13.3 18
Show 10066-1926 GWP1292 127 40.9 21
Show 10066-1919 S 607 AB 327 9.5 26
Show 10066-1919 TOK 66 AC 123 100.3 26
Show 10066-1919 TOK 66 Ba,Bb 47 0.2 27
Show 10073-2011 DON1087 234 6.6 29
Show 10113-1949 GWP1309 189 7.0 56
Show 10059-1851 ARA 408 308 8.3 56
Show 10100-1901 GWP1305 143 26.8 56
Show 10111-1922 XMI 97 300 17.9 57
Show 10082-2038 LDS3958 75.0 58
Show 10056-2038 ARA1082 124 11.6 62
Show 10114-2016 UC 1891 AB 60 9.5 67
Show 10100-1845 UC 1887 32 6.4 69
Show 10057-2049 ARA1083 274 15.4 70
Show 10027-2010 DAM 715 114 16.1 72
Show 10025-2006 ARA 662 95 10.8 73
Show 10022-1946 B 781 341 2.3 74
Show 10093-2051 ARA1084 196 13.5 75
Show 10059-2054 LDS3955 131 4.1 75
Show 10021-1921 WIS 165 229 987.5 78
Show 10031-1837 GWP1276 288 20.2 89
Show 10121-1837 SUB 4 193 399.4 95
Show 10045-1814 RST3676 309 0.5 98
Show 10124-1832 ARA 410 181 10.3 101
Show 10134-1847 LDS3965 97 37.1 103
Show 10027-2103 DON 383 214 4.3 104
Show 10040-1806 BU 1072 AB 53 12.7 108
Show 10040-1806 SHJ 110 AC 274 21.2 108
Show 10040-1806 BU 1072 BC 259 32.0 108
Show 10146-2028 ARA 665 61 11.4 111
Show 10014-1830 KPP 209 243 3.7 112
Show 09593-1956 LDS 294 170 24.3 115
Show 10157-1951 ARA 666 BC 194 30.2 118
Show 10157-1951 ARA 666 AB 1 20.7 118
Show 10157-1951 ARA 666 AC 217 11.2 118
Show 10063-1735 GWP1288 264 30.3 129
Show 10008-1809 ARA 220 6 7.7 133
Show 10140-1807 DAM2161 198 22.9 134
Show 09585-2035 ARA1081 353 4.2 135
Show 10006-1807 RST2664 214 0.7 136
Show 10007-2121 DON 380 283 2.9 136
Show 10166-2029 B 788 234 3.7 138
Show 10152-1817 UC 1901 218 31.3 141
Show 10143-1802 HU 459 95 1.3 141
Show 10157-1825 HLD 100 206 1.8 142
Show 09595-1813 GWP1266 205 31.3 143
Show 10168-2040 HLD 101 110 1.4 145

 
 
WDS 10074-1943 : COMPONENTS
 
 
  A
B pa=147.3°
sep=0.43"
 
 
10074-1943 A
 
 
Componente originario normalizzato AB Name HD 87840 Coord arcsec 2000 100722.22-194231.2 Mag 8.16
Spectral class A2IV (white) PmRA -34.00 PmDE 18.0 SAO 155744
HIP 49587 Tycho2 6054-00753-1 HD 87840 BD BD-19 2918
Tycho2
Tycho2 6054-00753-1 Pflag RAmdeg 151.84263192 DEmdeg -19.70872540
PmRA -33.9 PmDE 17.6 E RAmdeg 5 E DEmdeg 5
E pmRA 1.4 E pmDE 1.4 EpRAm 1991.23 EpDEm 1991.14
Num 8 Q RAmdeg 1.2 Q DEmdeg 1.6 Q pmRA 1.3
Q pmDE 1.6 BTmag 7.639 E BTmag 0.015 VTmag 7.501
E VTmag 0.011 Prox 999 TYC T HIP 49587
CCDM AB RAdeg 151.84271556 DEdeg -19.70876667 EpRA 1990 1.61
EpDE 1990 1.52 E RAdeg 4.7 E DEdeg 5.0 Posflg P
Corr 0.2
SAO
SAO 155744 DelFlag RA1950 PmRA1950 -0.0019
DE1950 PmDE1950 0.017 Vmag 7.5 SpType A0
Double code Source 22 CatNum 4511 DM BD-19 2918
DMcomp BDsup HD 87840 M HD 0
GC RA1950rad 2.63980485 DE1950rad -0.33971244 PmRA2000 -0.0016
PmDE2000 0.022
Hipparcos
Catalog H HIP 49587 Proxy H RAhms 10 07 22.24
DEdms -19 42 31.4 Vmag 7.41 VarFlag R Vmag H
RAdeg 151.843 DEdeg -19.7087 AstroRef A Plx 4.34
CCDM 10074-1943 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 138 Rho 0.542 HD 87840 BD BD-19 2918
CD CP Dm number -19 2918 VIred 0.12
SpType A1IV/V R SpType Coord arcsec 2000 100722.24-194231.4
Hipparcos 2
HIP 49587 Sn 15 So 3 Nc 2
RArad 2.6501547502 DErad -0.3439821662 Plx 4.81 PmRA -29.46
PmDE 15.19 E RArad 0.71 E DErad 0.87 E Plx 0.91
E pmRA 0.79 E pmDE 1.13 Hpmag 7.4552 E Hpmag 0.001
SHp 0.008 VA 0 BV 0.118 E BV 0.011
VI 0.13
CCDM
Ccdm 10074-1943 RComp Comp A Note1
Note2 Discov num DRAs -1.75 DDEs 29.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.8 Sp A0 PmNote *
PmRA -27 PmDE 17 Dm number -19 2918 Cat1 BD
Name2 155744 Cat2 SAO HD 87840 M HD
ADS BDS A 7647 M ADS BDS N IDS IDS 10026S1913A
HIC 49587
 
 
10074-1943 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 100722.24-194231.6 Mag 8.21 PmRA -34.00
PmDE 18.0 Calc delta mag 0.05 Calc coord yes
CCDM
Ccdm 10074-1943 RComp Comp B Note1
Note2 Discov num BU 218 DRAs DDEs
R dRAs Year 1959 Theta 132 Rho 0.6
Obs 22 Vmag 8.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 7647 M ADS BDS N IDS IDS 10026S1913B
HIC 49587