19471-1953 BU 146 (HD 186752)

 
 
19h 47m 06.75s -19 52' 50.4" P.A. 78.00 sep 0.5 mag 8.61,9.52 Sp G1/2V dist. 96.53 pc (314.88 l.y.)
 
 
Coord 2000 19471-1953 Discov num BU  146 Comp Coord arcsec 2000 19 47 06.75 -19 52 50.4
Date first 1873 Date last 2021 Obs 35
Pa first 290 Pa last 78.3 P.A. Now (θ) 78.3°
Sep first 1.0 Sep last 0.513 Sep. Now (ρ) 0.513"
Mag pri 8.61 Mag sec 9.52 delta mag (ΔM) 0.91 Spectral class G1/2V (yellow)
Pri motion ra -044 Sec motion ra -044
Pri motion dec -033 Sec motion dec -033
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 186752 Constellation Sagittarius SAO 188563 HIP 97348
Tycho2 6320-00835-1 Gaia DR2 6868665223370895232 HD 186752 ADS 12909
BD BD-20 5705 Distance 96.53 Distance ly 314.88
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)198.12y Periastron (T)2198.94y Semi-major axis (a)1.166a
Eccentricity (e)0.852 Inclination (i)65.3° Longitude of periastron (ω)271°
Node (Ω)220.6° Notes ReferenceMsn2019
Equinox2000 Last observation2018 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 73.6 0.121
2001 150.9 0.076
2002 199.4 0.158
2003 213.3 0.243
2004 220.3 0.312
2005 225.0 0.367
2006 228.6 0.412
2007 231.5 0.450
2008 234.0 0.483
2009 236.2 0.511
2010 238.1 0.537
2011 239.9 0.559
2012 241.6 0.580
2013 243.2 0.599
2014 244.6 0.616
2015 246.0 0.631
2016 247.3 0.646
2017 248.6 0.659
2018 249.8 0.671
2019 251.0 0.683
2020 252.1 0.694
2021 253.3 0.704
2022 254.3 0.713
2023 255.4 0.722
2024 256.4 0.731
2025 257.4 0.739
2026 258.4 0.746
2027 259.3 0.753
2028 260.3 0.760
2029 261.2 0.766
2030 262.1 0.772


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



 
 


wds19471-1953c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)115.2y± 1.6 Periastron (T)1998.28y± 0.12 Semi-major axis (a)1.106a± 0.018
Eccentricity (e)0.8144± 0.0058 Inclination (i)75.81°± 0.32 Longitude of periastron (ω)278.92°± 0.3
Node (Ω)34.32°± 0.25 Notes ReferenceMdz2021
Equinox Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 31.6 0.287
2001 36.7 0.371
2002 40.1 0.427
2003 42.8 0.466
2004 45.1 0.494
2005 47.3 0.515
2006 49.3 0.529
2007 51.2 0.539
2008 53.0 0.546
2009 54.8 0.550
2010 56.6 0.552
2011 58.4 0.552
2012 60.2 0.551
2013 62.0 0.549
2014 63.8 0.545
2015 65.6 0.541
2016 67.5 0.537
2017 69.4 0.532
2018 71.4 0.526
2019 73.3 0.521
2020 75.4 0.515
2021 77.4 0.509
2022 79.6 0.504
2023 81.7 0.498
2024 83.9 0.493
2025 86.2 0.487
2026 88.5 0.483
2027 90.9 0.478
2028 93.3 0.474
2029 95.7 0.470
2030 98.2 0.467


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



 
 


wds19471-1953d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic