Gaia Source ID - Star A : 2171346005266321024 Simbad
Gaia Source ID - Star B : 2171346009561513856 Simbad
Observation Epoch : J 2025.715 / 2025-09-19
Angular Separation : 2.810" ± 0.3057 mas
Position Angle : 136.42 ± 0.00530 degreesStar A/B Epoch : J 2016.000 / J 2016.000
Angular Separation : 2.806" ± 0.0233 mas
Position Angle : 136.53 ± 0.00040 degrees
LB of Projected Separation (AU): 3300.80 AU
Spatial Separation (pc) : 9.39 ± 47.59 pc
Spatial Separation (ly) : 30.62 ± 155.21 ly
Proper Motion Angular Difference : 5.38 ± 2.65 degrees
Total Proper Motion Difference : 0.54 ± 0.04 mas/yr
Tangential Velocity Difference : 3.21 ± 0.92 km/s
Aladin Lite Sky Atlas
DSS color
DSS blue
2MASS
AllWISE
Gaia Source ID : 2171346005266321024 Simbad
Parallax over error : 32.256 : very good
RUWE : 0.910 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 8.398 : G > 3 mag, photometry reliable
Excess noise : 0.230 : poor fit, model deviation significant
Significance : 45.979 : possible double star, motion, mismatch
BP-RP excess factor : 1.169 : photometry consistent
Visibility periods : 25 : high, indicates well observed star
IPD multi-peak frac : 0% : single peak detected
IDP GoF harmonic amp: 0.020 : unobtrusive (single star source)
Gaia Source ID : 2171346009561513856 Simbad
Parallax over error : 38.924 : very good
RUWE : 1.130 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 10.606 : G > 3 mag, photometry reliable
Excess noise : 0.179 : poor fit, model deviation significant
Significance : 36.492 : possible double star, motion, mismatch
BP-RP excess factor : 1.226 : photometry consistent
Visibility periods : 23 : high, indicates well observed star
IPD multi-peak frac : 1% : mulitple peaks detected (possible double)
IDP GoF harmonic amp: 0.016 : unobtrusive (single star source)
Spatial separation :
1936233.7 AU, with an uncertainty range of [ 3300.8 (P), 11751716.6] AU
Probability for a physical pair:
Close to or zero (Nominal) / Medium (at lower bound of uncertainty)
Separation-Based Evidence factor:
0.263 (Nominal) / Flag: normal
Relative Proper Motion Angular difference:
2.99 %
Relative Total Proper Motion difference:
15.03 %
Relative Tangential Velocity difference:
15.94 %
Estimated CPM Probability:
77.36 %
CPM-Based Evidence factor:
0.598
Combined Physical Binding Evidence factor:
0.372
RUWE probability for a binary system (Star A):
Zero
RUWE probability for a binary system (Star B):
Zero
-- For epoch J[1900-2100], computed using Gaia proper motions --
Click to expand/collapse - Separation and Position Angle for J-Epoch:
Epoch Sep[″] e_Sep[″] PA[°] e_PA[°]
-------------------------------------------------
1900.0 2.765 0.004 137.845 0.064
1901.0 2.766 0.004 137.834 0.063
1902.0 2.766 0.004 137.822 0.062
1903.0 2.766 0.004 137.810 0.062
1904.0 2.767 0.004 137.799 0.061
1905.0 2.767 0.004 137.787 0.061
1906.0 2.768 0.003 137.776 0.060
1907.0 2.768 0.003 137.764 0.060
1908.0 2.768 0.003 137.753 0.059
1909.0 2.769 0.003 137.741 0.059
1910.0 2.769 0.003 137.730 0.058
1911.0 2.769 0.003 137.718 0.057
1912.0 2.770 0.003 137.707 0.057
1913.0 2.770 0.003 137.695 0.056
1914.0 2.770 0.003 137.684 0.056
1915.0 2.771 0.003 137.672 0.055
1916.0 2.771 0.003 137.661 0.055
1917.0 2.771 0.003 137.650 0.054
1918.0 2.772 0.003 137.638 0.054
1919.0 2.772 0.003 137.627 0.053
1920.0 2.772 0.003 137.615 0.052
1921.0 2.773 0.003 137.604 0.052
1922.0 2.773 0.003 137.592 0.051
1923.0 2.773 0.003 137.581 0.051
1924.0 2.774 0.003 137.569 0.050
1925.0 2.774 0.003 137.558 0.050
1926.0 2.774 0.003 137.546 0.049
1927.0 2.775 0.003 137.535 0.049
1928.0 2.775 0.003 137.523 0.048
1929.0 2.775 0.003 137.512 0.048
1930.0 2.776 0.003 137.501 0.047
1931.0 2.776 0.003 137.489 0.046
1932.0 2.777 0.003 137.478 0.046
1933.0 2.777 0.003 137.466 0.045
1934.0 2.777 0.003 137.455 0.045
1935.0 2.778 0.003 137.443 0.044
1936.0 2.778 0.003 137.432 0.044
1937.0 2.778 0.002 137.421 0.043
1938.0 2.779 0.002 137.409 0.043
1939.0 2.779 0.002 137.398 0.042
1940.0 2.779 0.002 137.386 0.041
1941.0 2.780 0.002 137.375 0.041
1942.0 2.780 0.002 137.364 0.040
1943.0 2.780 0.002 137.352 0.040
1944.0 2.781 0.002 137.341 0.039
1945.0 2.781 0.002 137.329 0.039
1946.0 2.781 0.002 137.318 0.038
1947.0 2.782 0.002 137.307 0.038
1948.0 2.782 0.002 137.295 0.037
1949.0 2.782 0.002 137.284 0.037
1950.0 2.783 0.002 137.272 0.036
1951.0 2.783 0.002 137.261 0.035
1952.0 2.783 0.002 137.250 0.035
1953.0 2.784 0.002 137.238 0.034
1954.0 2.784 0.002 137.227 0.034
1955.0 2.785 0.002 137.216 0.033
1956.0 2.785 0.002 137.204 0.033
1957.0 2.785 0.002 137.193 0.032
1958.0 2.786 0.002 137.181 0.032
1959.0 2.786 0.002 137.170 0.031
1960.0 2.786 0.002 137.159 0.030
1961.0 2.787 0.002 137.147 0.030
1962.0 2.787 0.002 137.136 0.029
1963.0 2.787 0.002 137.125 0.029
1964.0 2.788 0.002 137.113 0.028
1965.0 2.788 0.002 137.102 0.028
1966.0 2.788 0.002 137.091 0.027
1967.0 2.789 0.002 137.079 0.027
1968.0 2.789 0.002 137.068 0.026
1969.0 2.789 0.001 137.057 0.026
1970.0 2.790 0.001 137.045 0.025
1971.0 2.790 0.001 137.034 0.024
1972.0 2.790 0.001 137.023 0.024
1973.0 2.791 0.001 137.011 0.023
1974.0 2.791 0.001 137.000 0.023
1975.0 2.792 0.001 136.989 0.022
1976.0 2.792 0.001 136.977 0.022
1977.0 2.792 0.001 136.966 0.021
1978.0 2.793 0.001 136.955 0.021
1979.0 2.793 0.001 136.944 0.020
1980.0 2.793 0.001 136.932 0.020
1981.0 2.794 0.001 136.921 0.019
1982.0 2.794 0.001 136.910 0.018
1983.0 2.794 0.001 136.898 0.018
1984.0 2.795 0.001 136.887 0.017
1985.0 2.795 0.001 136.876 0.017
1986.0 2.795 0.001 136.865 0.016
1987.0 2.796 0.001 136.853 0.016
1988.0 2.796 0.001 136.842 0.015
1989.0 2.796 0.001 136.831 0.015
1990.0 2.797 0.001 136.819 0.014
1991.0 2.797 0.001 136.808 0.014
1992.0 2.798 0.001 136.797 0.013
1993.0 2.798 0.001 136.786 0.012
1994.0 2.798 0.001 136.774 0.012
1995.0 2.799 0.001 136.763 0.011
1996.0 2.799 0.001 136.752 0.011
1997.0 2.799 0.001 136.741 0.010
1998.0 2.800 0.001 136.729 0.010
1999.0 2.800 0.001 136.718 0.009
2000.0 2.800 0.001 136.707 0.009
2001.0 2.801 0.000 136.696 0.008
2002.0 2.801 0.000 136.684 0.008
2003.0 2.801 0.000 136.673 0.007
2004.0 2.802 0.000 136.662 0.007
2005.0 2.802 0.000 136.651 0.006
2006.0 2.803 0.000 136.640 0.005
2007.0 2.803 0.000 136.628 0.005
2008.0 2.803 0.000 136.617 0.004
2009.0 2.804 0.000 136.606 0.004
2010.0 2.804 0.000 136.595 0.003
2011.0 2.804 0.000 136.583 0.003
2012.0 2.805 0.000 136.572 0.002
2013.0 2.805 0.000 136.561 0.002
2014.0 2.805 0.000 136.550 0.001
2015.0 2.806 0.000 136.539 0.001
2016.0 2.806 0.000 136.527 0.000
2017.0 2.806 0.000 136.516 0.001
2018.0 2.807 0.000 136.505 0.001
2019.0 2.807 0.000 136.494 0.002
2020.0 2.807 0.000 136.483 0.002
2021.0 2.808 0.000 136.472 0.003
2022.0 2.808 0.000 136.460 0.003
2023.0 2.809 0.000 136.449 0.004
2024.0 2.809 0.000 136.438 0.004
2025.0 2.809 0.000 136.427 0.005
2026.0 2.810 0.000 136.416 0.005
2027.0 2.810 0.000 136.405 0.006
2028.0 2.810 0.000 136.393 0.006
2029.0 2.811 0.000 136.382 0.007
2030.0 2.811 0.000 136.371 0.008
2031.0 2.811 0.000 136.360 0.008
2032.0 2.812 0.001 136.349 0.009
2033.0 2.812 0.001 136.338 0.009
2034.0 2.813 0.001 136.326 0.010
2035.0 2.813 0.001 136.315 0.010
2036.0 2.813 0.001 136.304 0.011
2037.0 2.814 0.001 136.293 0.011
2038.0 2.814 0.001 136.282 0.012
2039.0 2.814 0.001 136.271 0.012
2040.0 2.815 0.001 136.260 0.013
2041.0 2.815 0.001 136.249 0.013
2042.0 2.815 0.001 136.237 0.014
2043.0 2.816 0.001 136.226 0.015
2044.0 2.816 0.001 136.215 0.015
2045.0 2.816 0.001 136.204 0.016
2046.0 2.817 0.001 136.193 0.016
2047.0 2.817 0.001 136.182 0.017
2048.0 2.818 0.001 136.171 0.017
2049.0 2.818 0.001 136.160 0.018
2050.0 2.818 0.001 136.149 0.018
2051.0 2.819 0.001 136.137 0.019
2052.0 2.819 0.001 136.126 0.019
2053.0 2.819 0.001 136.115 0.020
2054.0 2.820 0.001 136.104 0.020
2055.0 2.820 0.001 136.093 0.021
2056.0 2.820 0.001 136.082 0.022
2057.0 2.821 0.001 136.071 0.022
2058.0 2.821 0.001 136.060 0.023
2059.0 2.821 0.001 136.049 0.023
2060.0 2.822 0.001 136.038 0.024
2061.0 2.822 0.001 136.027 0.024
2062.0 2.823 0.001 136.016 0.025
2063.0 2.823 0.001 136.005 0.025
2064.0 2.823 0.002 135.993 0.026
2065.0 2.824 0.002 135.982 0.026
2066.0 2.824 0.002 135.971 0.027
2067.0 2.824 0.002 135.960 0.027
2068.0 2.825 0.002 135.949 0.028
2069.0 2.825 0.002 135.938 0.029
2070.0 2.825 0.002 135.927 0.029
2071.0 2.826 0.002 135.916 0.030
2072.0 2.826 0.002 135.905 0.030
2073.0 2.827 0.002 135.894 0.031
2074.0 2.827 0.002 135.883 0.031
2075.0 2.827 0.002 135.872 0.032
2076.0 2.828 0.002 135.861 0.032
2077.0 2.828 0.002 135.850 0.033
2078.0 2.828 0.002 135.839 0.033
2079.0 2.829 0.002 135.828 0.034
2080.0 2.829 0.002 135.817 0.034
2081.0 2.829 0.002 135.806 0.035
2082.0 2.830 0.002 135.795 0.035
2083.0 2.830 0.002 135.784 0.036
2084.0 2.831 0.002 135.773 0.037
2085.0 2.831 0.002 135.762 0.037
2086.0 2.831 0.002 135.751 0.038
2087.0 2.832 0.002 135.740 0.038
2088.0 2.832 0.002 135.729 0.039
2089.0 2.832 0.002 135.718 0.039
2090.0 2.833 0.002 135.707 0.040
2091.0 2.833 0.002 135.696 0.040
2092.0 2.833 0.002 135.685 0.041
2093.0 2.834 0.002 135.674 0.041
2094.0 2.834 0.002 135.663 0.042
2095.0 2.835 0.002 135.652 0.042
2096.0 2.835 0.002 135.641 0.043
2097.0 2.835 0.003 135.630 0.043
2098.0 2.836 0.003 135.619 0.044
2099.0 2.836 0.003 135.608 0.044
2100.0 2.836 0.003 135.597 0.045
WDS ID Discovr Comp # Sep PA Epoch Obs Telescope Camera Note
--------------------------------------------------------------------------------------------------
21370+5032 ES 34 AB 1 2.80" 135.5° B2025.720 HWI 120/900 APO ASI678MM
-- Image of ES-34-AB-taken with Equinox 120/900 APO --
wds_id : 21370+5032
discoverer_code : ES
discoverer_number : 34
discoverer_components : AB
date_first : 1900
date_last : 2001
num_of_obs : 12
pa_first : 140
pa_last : 137
sep_first : 2.7
sep_last : 2.7
mag_primary : 8.4
mag_secondary : 10.7
spectral_type : A0
primary_proper_motion_RA : -1
primary_proper_motion_DEC : 2
secondary_proper_motion_RA :
secondary_proper_motion_DEC :
dm_number : +49 3568
notes :
precise_coordinate : 213659.27+503143.6
Click to expand/collapse the Gaia Input Data:
Star A
solution_id = 1636148068921376768
designation = Gaia DR3 2171346005266321024
source_id = 2171346005266321024
random_index = 767957602.0
ref_epoch = 2016.0
ra = 324.2469960547442
ra_error = 0.021131031
dec = 50.528756403116915
dec_error = 0.020233702
parallax = 0.843387015039129
parallax_error = 0.026146723
parallax_over_error = 32.255936
pm = 4.1571746
pmra = -3.104645950726205
pmra_error = 0.03018128
pmdec = -2.764646928071901
pmdec_error = 0.025933582
ra_dec_corr = -0.04963818
ra_parallax_corr = 0.025496662
ra_pmra_corr = 0.038828347
ra_pmdec_corr = -0.044931903
dec_parallax_corr = 0.10844218
dec_pmra_corr = -0.07593904
dec_pmdec_corr = -0.12374442
parallax_pmra_corr = -0.35708377
parallax_pmdec_corr = -0.018998008
pmra_pmdec_corr = -0.074923106
astrometric_n_obs_al = 355
astrometric_n_obs_ac = 355
astrometric_n_good_obs_al = 350
astrometric_n_bad_obs_al = 5
astrometric_gof_al = -2.375752
astrometric_chi2_al = 1748.9492
astrometric_excess_noise = 0.22960854
astrometric_excess_noise_sig = 45.97918
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.766402
astrometric_matched_transits = 41
visibility_periods_used = 25
astrometric_sigma5d_max = 0.04262326
matched_transits = 60
new_matched_transits = 14
matched_transits_removed = 3
ipd_gof_harmonic_amplitude = 0.020113733
ipd_gof_harmonic_phase = 167.03915
ipd_frac_multi_peak = 0
ipd_frac_odd_win = 0
ruwe = 0.9099976
duplicated_source = false
phot_g_n_obs = 475
phot_g_mean_flux = 8237119.203521531
phot_g_mean_flux_error = 4337.0273
phot_g_mean_flux_over_error = 1899.2546
phot_g_mean_mag = 8.397928
phot_bp_n_obs = 56
phot_bp_mean_flux = 6129941.356094061
phot_bp_mean_flux_error = 9463.1875
phot_bp_mean_flux_over_error = 647.7671
phot_bp_mean_mag = 8.369902
phot_rp_n_obs = 54
phot_rp_mean_flux = 3497011.455819545
phot_rp_mean_flux_error = 5757.077
phot_rp_mean_flux_over_error = 607.4283
phot_rp_mean_mag = 8.388653
phot_bp_rp_excess_factor = 1.1687281
phot_bp_n_contaminated_transits = 0
phot_bp_n_blended_transits = 6
phot_rp_n_contaminated_transits = 0
phot_rp_n_blended_transits = 41
phot_proc_mode = 0
bp_rp = -0.018751144
bp_g = -0.02802658
g_rp = 0.009275436
phot_variable_flag = VARIABLE
l = 94.43924612277088
b = -1.2638022574353844
ecl_lon = 356.2605250735615
ecl_lat = 58.86933652782843
in_qso_candidates = false
in_galaxy_candidates = false
non_single_star = 0
has_xp_continuous = false
has_xp_sampled = false
has_rvs = false
has_epoch_photometry = false
has_epoch_rv = false
has_mcmc_gspphot = false
has_mcmc_msc = false
in_andromeda_survey = false
classprob_dsc_combmod_quasar = 1.0851657e-13
classprob_dsc_combmod_galaxy = 5.4203484e-13
classprob_dsc_combmod_star = 0.9993827
teff_gspphot = 15213.079
teff_gspphot_lower = 14864.771
teff_gspphot_upper = 15365.419
logg_gspphot = 3.5351
logg_gspphot_lower = 3.4993
logg_gspphot_upper = 3.552
mh_gspphot = -0.4699
mh_gspphot_lower = -0.5689
mh_gspphot_upper = -0.357
distance_gspphot = 1147.5422
distance_gspphot_lower = 1126.697
distance_gspphot_upper = 1186.4587
azero_gspphot = 0.385
azero_gspphot_lower = 0.372
azero_gspphot_upper = 0.3904
ag_gspphot = 0.3787
ag_gspphot_lower = 0.3657
ag_gspphot_upper = 0.3841
ebpminrp_gspphot = 0.204
ebpminrp_gspphot_lower = 0.1969
ebpminrp_gspphot_upper = 0.207
libname_gspphot = A
Star B
solution_id = 1636148068921376768
designation = Gaia DR3 2171346009561513856
source_id = 2171346009561513856
random_index = 347863231.0
ref_epoch = 2016.0
ra = 324.2478396568323
ra_error = 0.018337416
dec = 50.528190739789515
dec_error = 0.018266791
parallax = 0.8501173673797267
parallax_error = 0.021840453
parallax_over_error = 38.92398
pm = 3.614141
pmra = -2.4616819606398894
pmra_error = 0.025749173
pmdec = -2.646154977527293
pmdec_error = 0.025056675
ra_dec_corr = 0.14157884
ra_parallax_corr = 0.22023946
ra_pmra_corr = -0.13802913
ra_pmdec_corr = -0.108293325
dec_parallax_corr = 0.20954841
dec_pmra_corr = -0.16571249
dec_pmdec_corr = -0.32760414
parallax_pmra_corr = -0.27056053
parallax_pmdec_corr = 0.03984944
pmra_pmdec_corr = 0.07334495
astrometric_n_obs_al = 314
astrometric_n_obs_ac = 314
astrometric_n_good_obs_al = 312
astrometric_n_bad_obs_al = 2
astrometric_gof_al = 3.1143856
astrometric_chi2_al = 1687.701
astrometric_excess_noise = 0.17883751
astrometric_excess_noise_sig = 36.492363
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.7332443
astrometric_matched_transits = 36
visibility_periods_used = 23
astrometric_sigma5d_max = 0.037392847
matched_transits = 59
new_matched_transits = 15
matched_transits_removed = 2
ipd_gof_harmonic_amplitude = 0.016462458
ipd_gof_harmonic_phase = 36.81375
ipd_frac_multi_peak = 1
ipd_frac_odd_win = 0
ruwe = 1.1271534
duplicated_source = false
phot_g_n_obs = 387
phot_g_mean_flux = 1078197.187667556
phot_g_mean_flux_error = 626.00555
phot_g_mean_flux_over_error = 1722.3445
phot_g_mean_mag = 10.605621
phot_bp_n_obs = 3
phot_bp_mean_flux = 799892.210755728
phot_bp_mean_flux_error = 13347.709
phot_bp_mean_flux_over_error = 59.927303
phot_bp_mean_mag = 10.580963
phot_rp_n_obs = 3
phot_rp_mean_flux = 521979.5764258459
phot_rp_mean_flux_error = 9866.702
phot_rp_mean_flux_over_error = 52.903145
phot_rp_mean_mag = 10.453762
phot_bp_rp_excess_factor = 1.2260019
phot_bp_n_contaminated_transits = 0
phot_bp_n_blended_transits = 3
phot_rp_n_contaminated_transits = 0
phot_rp_n_blended_transits = 3
phot_proc_mode = 0
bp_rp = 0.12720108
bp_g = -0.024658203
g_rp = 0.15185928
radial_velocity = -23.061337
radial_velocity_error = 20.451408
rv_method_used = 1
rv_nb_transits = 6
rv_nb_deblended_transits = 3
rv_visibility_periods_used = 6
rv_expected_sig_to_noise = 30.024862
rv_renormalised_gof = 9.524577
rv_chisq_pvalue = 0.0
rv_time_duration = 860.37305
rv_amplitude_robust = 101.94772
rv_template_teff = 12000.0
rv_template_logg = 5.0
rv_template_fe_h = 0.25
rv_atm_param_origin = 555
grvs_mag = 10.344124
grvs_mag_error = 0.01674347
grvs_mag_nb_transits = 3
rvs_spec_sig_to_noise = 32.940556
phot_variable_flag = NOT_AVAILABLE
l = 94.43926746816133
b = -1.2645814292453168
ecl_lon = 356.2606521183006
ecl_lat = 58.86855983611614
in_qso_candidates = false
in_galaxy_candidates = false
non_single_star = 0
has_xp_continuous = false
has_xp_sampled = false
has_rvs = false
has_epoch_photometry = false
has_epoch_rv = false
has_mcmc_gspphot = false
has_mcmc_msc = false
in_andromeda_survey = false
classprob_dsc_combmod_quasar = 1.07644816e-13
classprob_dsc_combmod_galaxy = 5.3768047e-13
classprob_dsc_combmod_star = 0.99944633
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 .
European Space Agency (ESA) mission Gaia , processed by the Gaia Data Processing and Analysis Consortium (DPAC) . Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Additionally, it incorporates data from the Washington Double Star Catalog, maintained at the U.S. Naval Observatory , and makes use of the Aladin Sky Atlas developed at CDS, Strasbourg Observatory, France.
Double Star Calculator:
Version 1.0 ($Rev: 1734 $)
Report created:
2025-12-29 22:23:05 +0100
www.stella-vega.de
