Double Star Calculator - Orbit

Orbital Elements for BLA6

WDS:	BLA6	WDS ID/Discoverer
P:	10.110	Orbital period (years)
a:	0.051	Semi-major axis (arcseconds)
i:	140.0	Inclination (degrees)
Ω:	170.2	Longitude of ascending node (degrees)
T:	1979.930	Epoch of periastron passage (year)
e:	0.44	Eccentricity
ω:	257.7	Longitude of periastron (degrees)
Start-Year:	2019.945	Year
End-Year:	2030.055	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BLA6
Position:	194723.27+183203.3	Epoch-2000 right ascension and declination
WDS-ID:	19474+1832	WDS designation
Discoverer Code:	BLA6	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	187076	HD catalog number
Hipparcos number:	97365	Hipparcos catalog number
V1:	4.32	Magnitude of the primary
V2:	4.95	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Eat1995	Reference

Double Star Orbit for BLA6

WDS 6th Orbit including measures of BLA6

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of BLA6

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.055    74.14
--------------------------
2019.94    0.029   320.55
2020.04    0.027   312.15
2020.14    0.025   302.50
2020.24    0.023   291.51
2020.34    0.022   279.29
2020.44    0.022   266.28
2020.54    0.022   253.20
2020.64    0.023   240.81
2020.74    0.025   229.62
2020.84    0.026   219.83
2020.94    0.029   211.39
2021.04    0.031   204.11
2021.14    0.033   197.81
2021.24    0.035   192.29
2021.34    0.037   187.40
2021.44    0.039   183.02
2021.54    0.041   179.06
2021.64    0.043   175.43
2021.74    0.044   172.09
2021.84    0.046   168.97
2021.94    0.047   166.05
2022.04    0.049   163.29
2022.14    0.050   160.67
2022.24    0.051   158.17
2022.34    0.052   155.76
2022.44    0.053   153.45
2022.54    0.054   151.21
2022.64    0.054   149.03
2022.74    0.055   146.91
2022.84    0.056   144.84
2022.94    0.056   142.81
2023.04    0.057   140.82
2023.14    0.057   138.86
2023.24    0.058   136.92
2023.34    0.058   135.01
2023.44    0.058   133.11
2023.54    0.058   131.24
2023.64    0.059   129.37
2023.74    0.059   127.51
2023.84    0.059   125.67
2023.94    0.059   123.82
2024.04    0.059   121.98
2024.14    0.059   120.14
2024.24    0.059   118.31
2024.34    0.059   116.46
2024.44    0.059   114.62
2024.54    0.059   112.77
2024.64    0.059   110.91
2024.74    0.058   109.05
2024.84    0.058   107.18
2024.94    0.058   105.29
2025.04    0.058   103.40
2025.14    0.058   101.49
2025.24    0.058    99.58
2025.34    0.057    97.64
2025.44    0.057    95.70
2025.54    0.057    93.74
2025.64    0.057    91.76
2025.74    0.056    89.77
2025.84    0.056    87.76
2025.94    0.056    85.73
2026.04    0.056    83.68
2026.14    0.055    81.62
2026.24    0.055    79.54
2026.34    0.055    77.43
2026.44    0.055    75.31
2026.54    0.054    73.17
2026.64    0.054    71.01
2026.74    0.054    68.82
2026.84    0.054    66.62
2026.94    0.053    64.39
2027.04    0.053    62.14
2027.14    0.053    59.87
2027.24    0.053    57.57
2027.34    0.052    55.25
2027.44    0.052    52.90
2027.54    0.052    50.53
2027.64    0.051    48.13
2027.74    0.051    45.69
2027.84    0.051    43.23
2027.94    0.050    40.72
2028.04    0.050    38.19
2028.14    0.049    35.61
2028.24    0.049    32.98
2028.34    0.049    30.31
2028.44    0.048    27.57
2028.54    0.047    24.78
2028.64    0.047    21.92
2028.74    0.046    18.97
2028.84    0.045    15.94
2028.94    0.045    12.80
2029.04    0.044     9.53
2029.14    0.043     6.13
2029.24    0.042     2.55
2029.34    0.040   358.77
2029.44    0.039   354.74
2029.54    0.038   350.42
2029.64    0.036   345.74
2029.74    0.034   340.62
2029.84    0.033   334.93
2029.94    0.031   328.56
2030.04    0.029   321.33

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 18:08:46