Gaia Source ID - Star A : 2171346005266321024 Simbad
Gaia Source ID - Star B : 2171346009571390720 Simbad
Observation Epoch : J 2025.715 / 2025-09-19
Angular Separation : 39.032" ± 0.2257 mas
Position Angle : 69.81 ± 0.00040 degreesStar A/B Epoch : J 2016.000 / J 2016.000
Angular Separation : 39.073" ± 0.0169 mas
Position Angle : 69.77 ± 0.00003 degrees
LB of Projected Separation (AU): 37636.79 AU
Spatial Separation (pc) : 222.45 ± 39.82 pc
Spatial Separation (ly) : 725.52 ± 129.86 ly
Proper Motion Angular Difference : 5.07 ± 1.88 degrees
Total Proper Motion Difference : 4.81 ± 0.03 mas/yr
Tangential Velocity Difference : 17.56 ± 0.99 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 : 2171346009571390720 Simbad
Parallax over error : 62.949 : very good
RUWE : 1.000 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 8.557 : G > 3 mag, photometry reliable
Excess noise : 0.111 : poor fit, model deviation significant
Significance : 12.225 : possible double star, motion, mismatch
BP-RP excess factor : 1.355 : photometry inconsistent
Visibility periods : 24 : high, indicates well observed star
IPD multi-peak frac : 0% : single peak detected
IDP GoF harmonic amp: 0.011 : unobtrusive (single star source)
Spatial separation :
222.45 pc, with an uncertainty range of [ 182.63, 262.26] pc
Probability for a physical pair:
Close to or zero (Nominal) / Close to or zero (at lower bound of uncertainty)
Separation-Based Evidence factor:
0.026 (Nominal) / Flag: normal
Relative Proper Motion Angular difference:
2.82 %
Relative Total Proper Motion difference:
115.61 %
Relative Tangential Velocity difference:
75.16 %
Estimated CPM Probability:
3.71 %
CPM-Based Evidence factor:
0.001
Combined Physical Binding Evidence factor:
0.026
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 39.555 0.003 69.356 0.004
1901.0 39.551 0.003 69.360 0.004
1902.0 39.547 0.003 69.363 0.004
1903.0 39.543 0.003 69.367 0.004
1904.0 39.539 0.003 69.371 0.004
1905.0 39.534 0.003 69.374 0.004
1906.0 39.530 0.003 69.378 0.004
1907.0 39.526 0.003 69.381 0.004
1908.0 39.522 0.003 69.385 0.004
1909.0 39.518 0.002 69.388 0.004
1910.0 39.514 0.002 69.392 0.004
1911.0 39.509 0.002 69.395 0.004
1912.0 39.505 0.002 69.399 0.004
1913.0 39.501 0.002 69.403 0.004
1914.0 39.497 0.002 69.406 0.004
1915.0 39.493 0.002 69.410 0.004
1916.0 39.489 0.002 69.413 0.004
1917.0 39.484 0.002 69.417 0.004
1918.0 39.480 0.002 69.420 0.004
1919.0 39.476 0.002 69.424 0.004
1920.0 39.472 0.002 69.428 0.004
1921.0 39.468 0.002 69.431 0.004
1922.0 39.464 0.002 69.435 0.004
1923.0 39.459 0.002 69.438 0.004
1924.0 39.455 0.002 69.442 0.003
1925.0 39.451 0.002 69.445 0.003
1926.0 39.447 0.002 69.449 0.003
1927.0 39.443 0.002 69.453 0.003
1928.0 39.439 0.002 69.456 0.003
1929.0 39.434 0.002 69.460 0.003
1930.0 39.430 0.002 69.463 0.003
1931.0 39.426 0.002 69.467 0.003
1932.0 39.422 0.002 69.470 0.003
1933.0 39.418 0.002 69.474 0.003
1934.0 39.414 0.002 69.478 0.003
1935.0 39.409 0.002 69.481 0.003
1936.0 39.405 0.002 69.485 0.003
1937.0 39.401 0.002 69.488 0.003
1938.0 39.397 0.002 69.492 0.003
1939.0 39.393 0.002 69.496 0.003
1940.0 39.389 0.002 69.499 0.003
1941.0 39.384 0.002 69.503 0.003
1942.0 39.380 0.002 69.506 0.003
1943.0 39.376 0.002 69.510 0.003
1944.0 39.372 0.002 69.513 0.003
1945.0 39.368 0.002 69.517 0.003
1946.0 39.364 0.002 69.521 0.003
1947.0 39.359 0.002 69.524 0.003
1948.0 39.355 0.002 69.528 0.003
1949.0 39.351 0.002 69.531 0.003
1950.0 39.347 0.002 69.535 0.003
1951.0 39.343 0.002 69.539 0.002
1952.0 39.339 0.001 69.542 0.002
1953.0 39.335 0.001 69.546 0.002
1954.0 39.330 0.001 69.549 0.002
1955.0 39.326 0.001 69.553 0.002
1956.0 39.322 0.001 69.557 0.002
1957.0 39.318 0.001 69.560 0.002
1958.0 39.314 0.001 69.564 0.002
1959.0 39.310 0.001 69.567 0.002
1960.0 39.305 0.001 69.571 0.002
1961.0 39.301 0.001 69.575 0.002
1962.0 39.297 0.001 69.578 0.002
1963.0 39.293 0.001 69.582 0.002
1964.0 39.289 0.001 69.585 0.002
1965.0 39.285 0.001 69.589 0.002
1966.0 39.280 0.001 69.593 0.002
1967.0 39.276 0.001 69.596 0.002
1968.0 39.272 0.001 69.600 0.002
1969.0 39.268 0.001 69.603 0.002
1970.0 39.264 0.001 69.607 0.002
1971.0 39.260 0.001 69.611 0.002
1972.0 39.256 0.001 69.614 0.002
1973.0 39.251 0.001 69.618 0.002
1974.0 39.247 0.001 69.621 0.002
1975.0 39.243 0.001 69.625 0.002
1976.0 39.239 0.001 69.629 0.002
1977.0 39.235 0.001 69.632 0.001
1978.0 39.231 0.001 69.636 0.001
1979.0 39.226 0.001 69.639 0.001
1980.0 39.222 0.001 69.643 0.001
1981.0 39.218 0.001 69.647 0.001
1982.0 39.214 0.001 69.650 0.001
1983.0 39.210 0.001 69.654 0.001
1984.0 39.206 0.001 69.658 0.001
1985.0 39.201 0.001 69.661 0.001
1986.0 39.197 0.001 69.665 0.001
1987.0 39.193 0.001 69.668 0.001
1988.0 39.189 0.001 69.672 0.001
1989.0 39.185 0.001 69.676 0.001
1990.0 39.181 0.001 69.679 0.001
1991.0 39.177 0.001 69.683 0.001
1992.0 39.172 0.001 69.687 0.001
1993.0 39.168 0.001 69.690 0.001
1994.0 39.164 0.001 69.694 0.001
1995.0 39.160 0.000 69.697 0.001
1996.0 39.156 0.000 69.701 0.001
1997.0 39.152 0.000 69.705 0.001
1998.0 39.147 0.000 69.708 0.001
1999.0 39.143 0.000 69.712 0.001
2000.0 39.139 0.000 69.716 0.001
2001.0 39.135 0.000 69.719 0.001
2002.0 39.131 0.000 69.723 0.001
2003.0 39.127 0.000 69.726 0.000
2004.0 39.123 0.000 69.730 0.000
2005.0 39.118 0.000 69.734 0.000
2006.0 39.114 0.000 69.737 0.000
2007.0 39.110 0.000 69.741 0.000
2008.0 39.106 0.000 69.745 0.000
2009.0 39.102 0.000 69.748 0.000
2010.0 39.098 0.000 69.752 0.000
2011.0 39.094 0.000 69.756 0.000
2012.0 39.089 0.000 69.759 0.000
2013.0 39.085 0.000 69.763 0.000
2014.0 39.081 0.000 69.766 0.000
2015.0 39.077 0.000 69.770 0.000
2016.0 39.073 0.000 69.774 0.000
2017.0 39.069 0.000 69.777 0.000
2018.0 39.064 0.000 69.781 0.000
2019.0 39.060 0.000 69.785 0.000
2020.0 39.056 0.000 69.788 0.000
2021.0 39.052 0.000 69.792 0.000
2022.0 39.048 0.000 69.796 0.000
2023.0 39.044 0.000 69.799 0.000
2024.0 39.040 0.000 69.803 0.000
2025.0 39.035 0.000 69.807 0.000
2026.0 39.031 0.000 69.810 0.000
2027.0 39.027 0.000 69.814 0.000
2028.0 39.023 0.000 69.818 0.000
2029.0 39.019 0.000 69.821 0.001
2030.0 39.015 0.000 69.825 0.001
2031.0 39.011 0.000 69.828 0.001
2032.0 39.006 0.000 69.832 0.001
2033.0 39.002 0.000 69.836 0.001
2034.0 38.998 0.000 69.839 0.001
2035.0 38.994 0.000 69.843 0.001
2036.0 38.990 0.000 69.847 0.001
2037.0 38.986 0.000 69.850 0.001
2038.0 38.982 0.001 69.854 0.001
2039.0 38.977 0.001 69.858 0.001
2040.0 38.973 0.001 69.861 0.001
2041.0 38.969 0.001 69.865 0.001
2042.0 38.965 0.001 69.869 0.001
2043.0 38.961 0.001 69.872 0.001
2044.0 38.957 0.001 69.876 0.001
2045.0 38.952 0.001 69.880 0.001
2046.0 38.948 0.001 69.883 0.001
2047.0 38.944 0.001 69.887 0.001
2048.0 38.940 0.001 69.891 0.001
2049.0 38.936 0.001 69.894 0.001
2050.0 38.932 0.001 69.898 0.001
2051.0 38.928 0.001 69.902 0.001
2052.0 38.923 0.001 69.905 0.001
2053.0 38.919 0.001 69.909 0.001
2054.0 38.915 0.001 69.913 0.001
2055.0 38.911 0.001 69.916 0.002
2056.0 38.907 0.001 69.920 0.002
2057.0 38.903 0.001 69.924 0.002
2058.0 38.899 0.001 69.927 0.002
2059.0 38.894 0.001 69.931 0.002
2060.0 38.890 0.001 69.935 0.002
2061.0 38.886 0.001 69.938 0.002
2062.0 38.882 0.001 69.942 0.002
2063.0 38.878 0.001 69.946 0.002
2064.0 38.874 0.001 69.949 0.002
2065.0 38.870 0.001 69.953 0.002
2066.0 38.865 0.001 69.957 0.002
2067.0 38.861 0.001 69.961 0.002
2068.0 38.857 0.001 69.964 0.002
2069.0 38.853 0.001 69.968 0.002
2070.0 38.849 0.001 69.972 0.002
2071.0 38.845 0.001 69.975 0.002
2072.0 38.841 0.001 69.979 0.002
2073.0 38.836 0.001 69.983 0.002
2074.0 38.832 0.001 69.986 0.002
2075.0 38.828 0.001 69.990 0.002
2076.0 38.824 0.001 69.994 0.002
2077.0 38.820 0.001 69.997 0.002
2078.0 38.816 0.001 70.001 0.002
2079.0 38.812 0.001 70.005 0.002
2080.0 38.808 0.001 70.008 0.002
2081.0 38.803 0.002 70.012 0.003
2082.0 38.799 0.002 70.016 0.003
2083.0 38.795 0.002 70.020 0.003
2084.0 38.791 0.002 70.023 0.003
2085.0 38.787 0.002 70.027 0.003
2086.0 38.783 0.002 70.031 0.003
2087.0 38.779 0.002 70.034 0.003
2088.0 38.774 0.002 70.038 0.003
2089.0 38.770 0.002 70.042 0.003
2090.0 38.766 0.002 70.045 0.003
2091.0 38.762 0.002 70.049 0.003
2092.0 38.758 0.002 70.053 0.003
2093.0 38.754 0.002 70.057 0.003
2094.0 38.750 0.002 70.060 0.003
2095.0 38.745 0.002 70.064 0.003
2096.0 38.741 0.002 70.068 0.003
2097.0 38.737 0.002 70.071 0.003
2098.0 38.733 0.002 70.075 0.003
2099.0 38.729 0.002 70.079 0.003
2100.0 38.725 0.002 70.082 0.003
WDS ID Discovr Comp # Sep PA Epoch Obs Telescope Camera Note
--------------------------------------------------------------------------------------------------
21370+5032 ES 34 AC 1 39.1" 70.1° B2025.720 HWI 120/900 APO ASI678MM
-- Image of ES-34-AC-taken with Equinox 120/900 APO --
wds_id : 21370+5032
discoverer_code : ES
discoverer_number : 34
discoverer_components : AC
date_first : 1900
date_last : 2015
num_of_obs : 22
pa_first : 70
pa_last : 70
sep_first : 39.5
sep_last : 39.1
mag_primary : 8.38
mag_secondary : 9.63
spectral_type : A0
primary_proper_motion_RA : -8
primary_proper_motion_DEC : 2
secondary_proper_motion_RA : -3
secondary_proper_motion_DEC : -7
dm_number : +49 3570
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 2171346009571390720
source_id = 2171346009571390720
random_index = 290755681.0
ref_epoch = 2016.0
ra = 324.26301810230586
ra_error = 0.012762802
dec = 50.53250768192244
dec_error = 0.0131676635
parallax = 1.0381535675737803
parallax_error = 0.016491996
parallax_over_error = 62.948936
pm = 8.963419
pmra = -6.140702349089384
pmra_error = 0.016966498
pmdec = -6.5295213070366405
pmdec_error = 0.015781472
ra_dec_corr = -0.011231271
ra_parallax_corr = 0.032610107
ra_pmra_corr = 0.005473348
ra_pmdec_corr = -0.16651043
dec_parallax_corr = 0.32015282
dec_pmra_corr = -0.26235455
dec_pmdec_corr = -0.17189497
parallax_pmra_corr = -0.33706167
parallax_pmdec_corr = 0.04197534
pmra_pmdec_corr = -0.0058874623
astrometric_n_obs_al = 378
astrometric_n_obs_ac = 378
astrometric_n_good_obs_al = 378
astrometric_n_bad_obs_al = 0
astrometric_gof_al = 0.10995002
astrometric_chi2_al = 856.241
astrometric_excess_noise = 0.110719316
astrometric_excess_noise_sig = 12.225125
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.3300422
astrometric_matched_transits = 43
visibility_periods_used = 24
astrometric_sigma5d_max = 0.024268344
matched_transits = 59
new_matched_transits = 14
matched_transits_removed = 2
ipd_gof_harmonic_amplitude = 0.011272738
ipd_gof_harmonic_phase = 167.27754
ipd_frac_multi_peak = 0
ipd_frac_odd_win = 0
ruwe = 1.0031335
duplicated_source = false
phot_g_n_obs = 482
phot_g_mean_flux = 7114706.887942706
phot_g_mean_flux_error = 2997.3352
phot_g_mean_flux_over_error = 2373.6775
phot_g_mean_mag = 8.556974
phot_bp_n_obs = 57
phot_bp_mean_flux = 1884312.4393600891
phot_bp_mean_flux_error = 2721.3384
phot_bp_mean_flux_over_error = 692.4212
phot_bp_mean_mag = 9.65066
phot_rp_n_obs = 54
phot_rp_mean_flux = 7754523.396912381
phot_rp_mean_flux_error = 6899.8477
phot_rp_mean_flux_over_error = 1123.8688
phot_rp_mean_mag = 7.524008
phot_bp_rp_excess_factor = 1.3547763
phot_bp_n_contaminated_transits = 0
phot_bp_n_blended_transits = 0
phot_rp_n_contaminated_transits = 0
phot_rp_n_blended_transits = 0
phot_proc_mode = 0
bp_rp = 2.1266518
bp_g = 1.0936852
g_rp = 1.0329666
radial_velocity = -37.222168
radial_velocity_error = 0.14017381
rv_method_used = 1
rv_nb_transits = 19
rv_nb_deblended_transits = 5
rv_visibility_periods_used = 14
rv_expected_sig_to_noise = 330.08597
rv_renormalised_gof = 1.4887211
rv_chisq_pvalue = 0.00039243314
rv_time_duration = 1010.33496
rv_amplitude_robust = 1.0836983
rv_template_teff = 3900.0
rv_template_logg = 1.5
rv_template_fe_h = 0.25
rv_atm_param_origin = 111
vbroad = 10.676133
vbroad_error = 0.5400131
vbroad_nb_transits = 11
grvs_mag = 7.0837812
grvs_mag_error = 0.0048171715
grvs_mag_nb_transits = 14
phot_variable_flag = NOT_AVAILABLE
l = 94.44933455573785
b = -1.2678113306842183
ecl_lon = 356.2804420455029
ecl_lat = 58.86590684667797
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 = 1.02690216e-13
classprob_dsc_combmod_galaxy = 5.1293247e-13
classprob_dsc_combmod_star = 0.9999339
teff_gspphot = 4743.309
teff_gspphot_lower = 4728.853
teff_gspphot_upper = 4750.001
logg_gspphot = 1.6384
logg_gspphot_lower = 1.624
logg_gspphot_upper = 1.6427
mh_gspphot = -0.5221
mh_gspphot_lower = -0.533
mh_gspphot_upper = -0.5198
distance_gspphot = 874.0801
distance_gspphot_lower = 871.3008
distance_gspphot_upper = 885.6747
azero_gspphot = 2.428
azero_gspphot_lower = 2.4125
azero_gspphot_upper = 2.435
ag_gspphot = 1.7691
ag_gspphot_lower = 1.7569
ag_gspphot_upper = 1.7747
ebpminrp_gspphot = 0.9545
ebpminrp_gspphot_lower = 0.9475
ebpminrp_gspphot_upper = 0.9576
libname_gspphot = MARCS
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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 22:23:15 +0100
www.stella-vega.de
