Double Star Calculator - Orbit

Orbital Elements for HDS2554

WDS:	HDS2554	WDS ID/Discoverer
P:	21.600	Orbital period (years)
a:	0.1118	Semi-major axis (arcseconds)
i:	75.3	Inclination (degrees)
Ω:	208.3	Longitude of ascending node (degrees)
T:	2001.400	Epoch of periastron passage (year)
e:	0.217	Eccentricity
ω:	160.0	Longitude of periastron (degrees)
Start-Year:	2014.2	Year
End-Year:	2035.8	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2554
Position:	180821.80+440645.1	Epoch-2000 right ascension and declination
WDS-ID:	18084+4407	WDS designation
Discoverer Code:	HDS2554	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	166409	HD catalog number
Hipparcos number:	88852	Hipparcos catalog number
V1:	7.58	Magnitude of the primary
V2:	7.81	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Hor2011b	Reference

Double Star Orbit for HDS2554

WDS 6th Orbit including measures of HDS2554

-- 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 HDS2554

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.053    54.06
--------------------------
2014.20    0.133   208.88
2014.30    0.133   209.17
2014.40    0.132   209.46
2014.50    0.132   209.76
2014.60    0.131   210.06
2014.70    0.131   210.36
2014.80    0.130   210.66
2014.90    0.129   210.97
2015.00    0.128   211.28
2015.10    0.127   211.60
2015.20    0.126   211.92
2015.30    0.125   212.25
2015.40    0.124   212.58
2015.50    0.123   212.92
2015.60    0.122   213.26
2015.70    0.120   213.61
2015.80    0.119   213.97
2015.90    0.118   214.34
2016.00    0.116   214.72
2016.10    0.115   215.10
2016.20    0.113   215.50
2016.30    0.111   215.91
2016.40    0.110   216.34
2016.50    0.108   216.77
2016.60    0.106   217.22
2016.70    0.104   217.69
2016.80    0.102   218.18
2016.90    0.100   218.68
2017.00    0.098   219.21
2017.10    0.096   219.76
2017.20    0.094   220.34
2017.30    0.091   220.94
2017.40    0.089   221.58
2017.50    0.087   222.25
2017.60    0.084   222.96
2017.70    0.082   223.71
2017.80    0.079   224.51
2017.90    0.077   225.36
2018.00    0.074   226.27
2018.10    0.071   227.25
2018.20    0.069   228.30
2018.30    0.066   229.44
2018.40    0.063   230.67
2018.50    0.060   232.02
2018.60    0.058   233.50
2018.70    0.055   235.13
2018.80    0.052   236.94
2018.90    0.049   238.94
2019.00    0.047   241.18
2019.10    0.044   243.71
2019.20    0.041   246.56
2019.30    0.039   249.80
2019.40    0.036   253.50
2019.50    0.034   257.73
2019.60    0.032   262.57
2019.70    0.030   268.08
2019.80    0.028   274.31
2019.90    0.027   281.24
2020.00    0.026   288.80
2020.10    0.025   296.79
2020.20    0.025   304.95
2020.30    0.026   312.96
2020.40    0.027   320.57
2020.50    0.028   327.57
2020.60    0.029   333.87
2020.70    0.031   339.45
2020.80    0.034   344.36
2020.90    0.036   348.66
2021.00    0.038   352.42
2021.10    0.041   355.73
2021.20    0.043   358.65
2021.30    0.046     1.24
2021.40    0.049     3.54
2021.50    0.051     5.62
2021.60    0.054     7.48
2021.70    0.056     9.18
2021.80    0.059    10.73
2021.90    0.061    12.16
2022.00    0.064    13.47
2022.10    0.066    14.70
2022.20    0.068    15.84
2022.30    0.071    16.90
2022.40    0.073    17.91
2022.50    0.075    18.86
2022.60    0.076    19.77
2022.70    0.078    20.63
2022.80    0.080    21.46
2022.90    0.081    22.25
2023.00    0.083    23.02
2023.10    0.084    23.77
2023.20    0.085    24.49
2023.30    0.086    25.20
2023.40    0.087    25.89
2023.50    0.087    26.57
2023.60    0.088    27.25
2023.70    0.088    27.91
2023.80    0.089    28.57
2023.90    0.089    29.23
2024.00    0.089    29.88
2024.10    0.089    30.54
2024.20    0.088    31.20
2024.30    0.088    31.86
2024.40    0.087    32.54
2024.50    0.087    33.22
2024.60    0.086    33.91
2024.70    0.085    34.62
2024.80    0.084    35.35
2024.90    0.083    36.09
2025.00    0.081    36.86
2025.10    0.080    37.65
2025.20    0.079    38.47
2025.30    0.077    39.32
2025.40    0.075    40.20
2025.50    0.074    41.13
2025.60    0.072    42.10
2025.70    0.070    43.12
2025.80    0.068    44.20
2025.90    0.066    45.34
2026.00    0.064    46.56
2026.10    0.062    47.85
2026.20    0.060    49.24
2026.30    0.058    50.72
2026.40    0.056    52.32
2026.50    0.053    54.06
2026.60    0.051    55.94
2026.70    0.049    57.98
2026.80    0.047    60.22
2026.90    0.045    62.67
2027.00    0.043    65.36
2027.10    0.041    68.33
2027.20    0.039    71.60
2027.30    0.037    75.20
2027.40    0.035    79.16
2027.50    0.034    83.51
2027.60    0.032    88.26
2027.70    0.031    93.39
2027.80    0.030    98.88
2027.90    0.030   104.65
2028.00    0.029   110.63
2028.10    0.029   116.69
2028.20    0.029   122.72
2028.30    0.030   128.59
2028.40    0.031   134.20
2028.50    0.032   139.47
2028.60    0.033   144.37
2028.70    0.035   148.87
2028.80    0.036   152.97
2028.90    0.038   156.70
2029.00    0.040   160.08
2029.10    0.042   163.14
2029.20    0.044   165.92
2029.30    0.046   168.43
2029.40    0.049   170.72
2029.50    0.051   172.80
2029.60    0.053   174.71
2029.70    0.056   176.46
2029.80    0.058   178.06
2029.90    0.060   179.54
2030.00    0.063   180.91
2030.10    0.065   182.18
2030.20    0.067   183.37
2030.30    0.070   184.47
2030.40    0.072   185.50
2030.50    0.074   186.47
2030.60    0.076   187.38
2030.70    0.079   188.24
2030.80    0.081   189.05
2030.90    0.083   189.82
2031.00    0.085   190.55
2031.10    0.087   191.24
2031.20    0.089   191.90
2031.30    0.092   192.53
2031.40    0.094   193.13
2031.50    0.096   193.71
2031.60    0.097   194.26
2031.70    0.099   194.80
2031.80    0.101   195.31
2031.90    0.103   195.80
2032.00    0.105   196.28
2032.10    0.107   196.74
2032.20    0.108   197.19
2032.30    0.110   197.63
2032.40    0.111   198.05
2032.50    0.113   198.46
2032.60    0.115   198.86
2032.70    0.116   199.24
2032.80    0.117   199.62
2032.90    0.119   199.99
2033.00    0.120   200.36
2033.10    0.121   200.71
2033.20    0.122   201.06
2033.30    0.124   201.40
2033.40    0.125   201.73
2033.50    0.126   202.06
2033.60    0.127   202.39
2033.70    0.128   202.71
2033.80    0.128   203.02
2033.90    0.129   203.33
2034.00    0.130   203.64
2034.10    0.131   203.95
2034.20    0.131   204.25
2034.30    0.132   204.54
2034.40    0.132   204.84
2034.50    0.133   205.13
2034.60    0.133   205.43
2034.70    0.134   205.72
2034.80    0.134   206.00
2034.90    0.134   206.29
2035.00    0.134   206.58
2035.10    0.134   206.87
2035.20    0.134   207.15
2035.30    0.134   207.44
2035.40    0.134   207.72
2035.50    0.134   208.01
2035.60    0.134   208.30
2035.70    0.134   208.59

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 17:48:08