Gaia Source ID - Star A : 1963780444991070592 Simbad
Gaia Source ID - Star B : 1963780444991073664 Simbad
Observation Epoch : J 2024.680 / 2024-09-06
Angular Separation : 25.494" ± 0.1117 mas
Position Angle : 275.14 ± 0.00030 degreesStar A/B Epoch : J 2016.000 / J 2016.000
Angular Separation : 25.459" ± 0.0094 mas
Position Angle : 274.90 ± 0.00003 degrees
LB of Projected Separation (AU): 9975.16 AU
Spatial Separation (pc) : 511.92 ± 8.89 pc
Spatial Separation (ly) : 1669.67 ± 28.98 ly
Proper Motion Angular Difference : 22.63 ± 1.88 degrees
Total Proper Motion Difference : 11.96 ± 0.02 mas/yr
Tangential Velocity Difference : 1.12 ± 0.46 km/s
Radial Velocity Difference : 2.40 ± 8.28 km/s
Space Velocity Difference : 0.22 ± 3.93 km/s
Aladin Lite Sky Atlas
DSS color
DSS blue
2MASS
AllWISE
Gaia Source ID : 1963780444991070592 Simbad
Parallax over error : 170.401 : very good
RUWE : 0.960 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 7.257 : G > 3 mag, photometry reliable
Excess noise : 0.110 : poor fit, model deviation significant
Significance : 13.750 : possible double star, motion, mismatch
BP-RP excess factor : 1.278 : photometry consistent
Visibility periods : 28 : high, indicates well observed star
IPD multi-peak frac : 0% : single peak detected
IDP GoF harmonic amp: 0.006 : unobtrusive (single star source)
Gaia Source ID : 1963780444991073664 Simbad
Parallax over error : 105.300 : very good
RUWE : 0.950 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 12.669 : G > 3 mag, photometry reliable
Excess noise : 0.046 : poor fit, model deviation significant
Significance : 3.387 : possible double star, motion, mismatch
BP-RP excess factor : 1.205 : photometry consistent
Visibility periods : 28 : high, indicates well observed star
IPD multi-peak frac : 0% : single peak detected
IDP GoF harmonic amp: 0.007 : unobtrusive (single star source)
Spatial separation :
511.92 pc, with an uncertainty range of [ 503.04, 520.81] 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:
12.57 %
Relative Total Proper Motion difference:
124.41 %
Relative Tangential Velocity difference:
2.78 %
Relative Radial Velocity difference:
-9.79 %
Relative Space Velocity difference:
0.47 %
Estimated CPM Probability:
5.58 %
CPM-Based Evidence factor:
0.003
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 25.040 0.001 271.547 0.004
1901.0 25.043 0.001 271.577 0.004
1902.0 25.046 0.001 271.606 0.004
1903.0 25.050 0.001 271.635 0.004
1904.0 25.053 0.001 271.665 0.004
1905.0 25.056 0.001 271.694 0.004
1906.0 25.059 0.001 271.723 0.004
1907.0 25.063 0.001 271.753 0.004
1908.0 25.066 0.001 271.782 0.004
1909.0 25.069 0.001 271.811 0.004
1910.0 25.073 0.001 271.840 0.004
1911.0 25.076 0.001 271.870 0.004
1912.0 25.079 0.001 271.899 0.004
1913.0 25.082 0.001 271.928 0.004
1914.0 25.086 0.001 271.958 0.004
1915.0 25.089 0.001 271.987 0.004
1916.0 25.092 0.001 272.016 0.004
1917.0 25.096 0.001 272.045 0.003
1918.0 25.099 0.001 272.074 0.003
1919.0 25.103 0.001 272.104 0.003
1920.0 25.106 0.001 272.133 0.003
1921.0 25.109 0.001 272.162 0.003
1922.0 25.113 0.001 272.191 0.003
1923.0 25.116 0.001 272.220 0.003
1924.0 25.119 0.001 272.250 0.003
1925.0 25.123 0.001 272.279 0.003
1926.0 25.126 0.001 272.308 0.003
1927.0 25.130 0.001 272.337 0.003
1928.0 25.133 0.001 272.366 0.003
1929.0 25.136 0.001 272.395 0.003
1930.0 25.140 0.001 272.425 0.003
1931.0 25.143 0.001 272.454 0.003
1932.0 25.147 0.001 272.483 0.003
1933.0 25.150 0.001 272.512 0.003
1934.0 25.154 0.001 272.541 0.003
1935.0 25.157 0.001 272.570 0.003
1936.0 25.161 0.001 272.599 0.003
1937.0 25.164 0.001 272.628 0.003
1938.0 25.168 0.001 272.657 0.003
1939.0 25.171 0.001 272.686 0.003
1940.0 25.175 0.001 272.715 0.003
1941.0 25.178 0.001 272.744 0.003
1942.0 25.182 0.001 272.773 0.003
1943.0 25.185 0.001 272.803 0.003
1944.0 25.189 0.001 272.832 0.003
1945.0 25.192 0.001 272.861 0.002
1946.0 25.196 0.001 272.890 0.002
1947.0 25.199 0.001 272.919 0.002
1948.0 25.203 0.001 272.948 0.002
1949.0 25.206 0.001 272.977 0.002
1950.0 25.210 0.001 273.005 0.002
1951.0 25.213 0.001 273.034 0.002
1952.0 25.217 0.001 273.063 0.002
1953.0 25.221 0.001 273.092 0.002
1954.0 25.224 0.001 273.121 0.002
1955.0 25.228 0.001 273.150 0.002
1956.0 25.231 0.001 273.179 0.002
1957.0 25.235 0.001 273.208 0.002
1958.0 25.239 0.001 273.237 0.002
1959.0 25.242 0.001 273.266 0.002
1960.0 25.246 0.001 273.295 0.002
1961.0 25.250 0.001 273.324 0.002
1962.0 25.253 0.001 273.352 0.002
1963.0 25.257 0.001 273.381 0.002
1964.0 25.260 0.001 273.410 0.002
1965.0 25.264 0.001 273.439 0.002
1966.0 25.268 0.001 273.468 0.002
1967.0 25.271 0.001 273.497 0.002
1968.0 25.275 0.001 273.525 0.002
1969.0 25.279 0.001 273.554 0.002
1970.0 25.282 0.001 273.583 0.002
1971.0 25.286 0.001 273.612 0.002
1972.0 25.290 0.001 273.641 0.002
1973.0 25.294 0.001 273.669 0.002
1974.0 25.297 0.001 273.698 0.001
1975.0 25.301 0.001 273.727 0.001
1976.0 25.305 0.001 273.756 0.001
1977.0 25.309 0.000 273.784 0.001
1978.0 25.312 0.000 273.813 0.001
1979.0 25.316 0.000 273.842 0.001
1980.0 25.320 0.000 273.871 0.001
1981.0 25.324 0.000 273.899 0.001
1982.0 25.327 0.000 273.928 0.001
1983.0 25.331 0.000 273.957 0.001
1984.0 25.335 0.000 273.985 0.001
1985.0 25.339 0.000 274.014 0.001
1986.0 25.342 0.000 274.043 0.001
1987.0 25.346 0.000 274.071 0.001
1988.0 25.350 0.000 274.100 0.001
1989.0 25.354 0.000 274.129 0.001
1990.0 25.358 0.000 274.157 0.001
1991.0 25.361 0.000 274.186 0.001
1992.0 25.365 0.000 274.215 0.001
1993.0 25.369 0.000 274.243 0.001
1994.0 25.373 0.000 274.272 0.001
1995.0 25.377 0.000 274.300 0.001
1996.0 25.381 0.000 274.329 0.001
1997.0 25.385 0.000 274.358 0.001
1998.0 25.388 0.000 274.386 0.001
1999.0 25.392 0.000 274.415 0.001
2000.0 25.396 0.000 274.443 0.001
2001.0 25.400 0.000 274.472 0.001
2002.0 25.404 0.000 274.500 0.000
2003.0 25.408 0.000 274.529 0.000
2004.0 25.412 0.000 274.557 0.000
2005.0 25.416 0.000 274.586 0.000
2006.0 25.420 0.000 274.614 0.000
2007.0 25.423 0.000 274.643 0.000
2008.0 25.427 0.000 274.671 0.000
2009.0 25.431 0.000 274.700 0.000
2010.0 25.435 0.000 274.728 0.000
2011.0 25.439 0.000 274.757 0.000
2012.0 25.443 0.000 274.785 0.000
2013.0 25.447 0.000 274.814 0.000
2014.0 25.451 0.000 274.842 0.000
2015.0 25.455 0.000 274.870 0.000
2016.0 25.459 0.000 274.899 0.000
2017.0 25.463 0.000 274.927 0.000
2018.0 25.467 0.000 274.956 0.000
2019.0 25.471 0.000 274.984 0.000
2020.0 25.475 0.000 275.012 0.000
2021.0 25.479 0.000 275.041 0.000
2022.0 25.483 0.000 275.069 0.000
2023.0 25.487 0.000 275.097 0.000
2024.0 25.491 0.000 275.126 0.000
2025.0 25.495 0.000 275.154 0.000
2026.0 25.499 0.000 275.182 0.000
2027.0 25.503 0.000 275.211 0.000
2028.0 25.507 0.000 275.239 0.000
2029.0 25.511 0.000 275.267 0.000
2030.0 25.515 0.000 275.295 0.000
2031.0 25.520 0.000 275.324 0.001
2032.0 25.524 0.000 275.352 0.001
2033.0 25.528 0.000 275.380 0.001
2034.0 25.532 0.000 275.409 0.001
2035.0 25.536 0.000 275.437 0.001
2036.0 25.540 0.000 275.465 0.001
2037.0 25.544 0.000 275.493 0.001
2038.0 25.548 0.000 275.521 0.001
2039.0 25.552 0.000 275.550 0.001
2040.0 25.556 0.000 275.578 0.001
2041.0 25.561 0.000 275.606 0.001
2042.0 25.565 0.000 275.634 0.001
2043.0 25.569 0.000 275.662 0.001
2044.0 25.573 0.000 275.690 0.001
2045.0 25.577 0.000 275.719 0.001
2046.0 25.581 0.000 275.747 0.001
2047.0 25.586 0.000 275.775 0.001
2048.0 25.590 0.000 275.803 0.001
2049.0 25.594 0.000 275.831 0.001
2050.0 25.598 0.000 275.859 0.001
2051.0 25.602 0.000 275.887 0.001
2052.0 25.607 0.000 275.915 0.001
2053.0 25.611 0.000 275.943 0.001
2054.0 25.615 0.000 275.971 0.001
2055.0 25.619 0.001 276.000 0.001
2056.0 25.623 0.001 276.028 0.001
2057.0 25.628 0.001 276.056 0.001
2058.0 25.632 0.001 276.084 0.001
2059.0 25.636 0.001 276.112 0.001
2060.0 25.640 0.001 276.140 0.002
2061.0 25.645 0.001 276.168 0.002
2062.0 25.649 0.001 276.196 0.002
2063.0 25.653 0.001 276.224 0.002
2064.0 25.657 0.001 276.252 0.002
2065.0 25.662 0.001 276.280 0.002
2066.0 25.666 0.001 276.307 0.002
2067.0 25.670 0.001 276.335 0.002
2068.0 25.675 0.001 276.363 0.002
2069.0 25.679 0.001 276.391 0.002
2070.0 25.683 0.001 276.419 0.002
2071.0 25.688 0.001 276.447 0.002
2072.0 25.692 0.001 276.475 0.002
2073.0 25.696 0.001 276.503 0.002
2074.0 25.701 0.001 276.531 0.002
2075.0 25.705 0.001 276.559 0.002
2076.0 25.709 0.001 276.586 0.002
2077.0 25.714 0.001 276.614 0.002
2078.0 25.718 0.001 276.642 0.002
2079.0 25.722 0.001 276.670 0.002
2080.0 25.727 0.001 276.698 0.002
2081.0 25.731 0.001 276.726 0.002
2082.0 25.735 0.001 276.753 0.002
2083.0 25.740 0.001 276.781 0.002
2084.0 25.744 0.001 276.809 0.002
2085.0 25.749 0.001 276.837 0.002
2086.0 25.753 0.001 276.864 0.002
2087.0 25.758 0.001 276.892 0.002
2088.0 25.762 0.001 276.920 0.002
2089.0 25.766 0.001 276.948 0.002
2090.0 25.771 0.001 276.975 0.003
2091.0 25.775 0.001 277.003 0.003
2092.0 25.780 0.001 277.031 0.003
2093.0 25.784 0.001 277.059 0.003
2094.0 25.789 0.001 277.086 0.003
2095.0 25.793 0.001 277.114 0.003
2096.0 25.798 0.001 277.142 0.003
2097.0 25.802 0.001 277.169 0.003
2098.0 25.806 0.001 277.197 0.003
2099.0 25.811 0.001 277.224 0.003
2100.0 25.815 0.001 277.252 0.003
WDS ID Discovr Comp # Sep PA Epoch Obs Telescope Camera Note
-------------------------------------------------------------------------------------------------
21268+3731 HEI 9004 AC 1 25.54" 275.42° B2024.685 HWI 120/900 APO ASI678MM
wds_id : 21268+3731
discoverer_code : HEI
discoverer_number : 9004
discoverer_components : AC
date_first : 1929
date_last : 2024
num_of_obs : 7
pa_first : 273
pa_last : 275
sep_first : 25.4
sep_last : 25.5
mag_primary : 8.91
mag_secondary : 12.75
spectral_type : K0
primary_proper_motion_RA : 0
primary_proper_motion_DEC : -22
secondary_proper_motion_RA : -4
secondary_proper_motion_DEC : -13
dm_number :
notes :
precise_coordinate : 212647.68+373103.7
Click to expand/collapse the Gaia Input Data:
Star A
solution_id = 1636148068921376768
designation = Gaia DR3 1963780444991070592
source_id = 1963780444991070592
random_index = 900856088.0
ref_epoch = 2016.0
ra = 321.69863584799367
ra_error = 0.009606591
dec = 37.51753925604059
dec_error = 0.01129278
parallax = 2.552248220808484
parallax_error = 0.014977921
parallax_over_error = 170.40071
pm = 21.58103
pmra = -1.364068969344534
pmra_error = 0.013322931
pmdec = -21.5378779784224
pmdec_error = 0.014208239
ra_dec_corr = -0.17890242
ra_parallax_corr = -0.001826161
ra_pmra_corr = -0.112910666
ra_pmdec_corr = -0.030140605
dec_parallax_corr = 0.083535515
dec_pmra_corr = -0.040664077
dec_pmdec_corr = -0.24056073
parallax_pmra_corr = -0.05351547
parallax_pmdec_corr = -0.057280127
pmra_pmdec_corr = -0.20872234
astrometric_n_obs_al = 550
astrometric_n_obs_ac = 550
astrometric_n_good_obs_al = 549
astrometric_n_bad_obs_al = 1
astrometric_gof_al = -1.3948692
astrometric_chi2_al = 1116.8468
astrometric_excess_noise = 0.110353574
astrometric_excess_noise_sig = 13.750453
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.4014672
astrometric_matched_transits = 62
visibility_periods_used = 28
astrometric_sigma5d_max = 0.021122403
matched_transits = 63
new_matched_transits = 24
matched_transits_removed = 6
ipd_gof_harmonic_amplitude = 0.00553942
ipd_gof_harmonic_phase = 96.04603
ipd_frac_multi_peak = 0
ipd_frac_odd_win = 0
ruwe = 0.9574073
duplicated_source = false
phot_g_n_obs = 551
phot_g_mean_flux = 23548931.408015512
phot_g_mean_flux_error = 4679.9507
phot_g_mean_flux_over_error = 5031.876
phot_g_mean_mag = 7.2574387
phot_bp_n_obs = 61
phot_bp_mean_flux = 8476731.494147452
phot_bp_mean_flux_error = 7295.611
phot_bp_mean_flux_over_error = 1161.8947
phot_bp_mean_mag = 8.017971
phot_rp_n_obs = 60
phot_rp_mean_flux = 21623052.402102966
phot_rp_mean_flux_error = 13611.894
phot_rp_mean_flux_over_error = 1588.5411
phot_rp_mean_mag = 6.410603
phot_bp_rp_excess_factor = 1.2781805
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 = 1.607368
bp_g = 0.7605324
g_rp = 0.8468356
radial_velocity = -24.473946
radial_velocity_error = 0.123498164
rv_method_used = 1
rv_nb_transits = 33
rv_nb_deblended_transits = 0
rv_visibility_periods_used = 21
rv_expected_sig_to_noise = 726.86554
rv_renormalised_gof = 2.2223425
rv_chisq_pvalue = 0.0004095251
rv_time_duration = 896.1901
rv_amplitude_robust = 0.9760895
rv_template_teff = 4250.0
rv_template_logg = 1.0
rv_template_fe_h = -0.25
rv_atm_param_origin = 444
vbroad = 7.6477785
vbroad_error = 0.47887766
vbroad_nb_transits = 33
grvs_mag = 6.0798545
grvs_mag_error = 0.0059486083
grvs_mag_nb_transits = 33
phot_variable_flag = NOT_AVAILABLE
l = 84.14753037105889
b = -9.497534016194532
ecl_lon = 341.45687312486336
ecl_lat = 48.96414242127367
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 = 1.02125156e-13
classprob_dsc_combmod_galaxy = 5.1011e-13
classprob_dsc_combmod_star = 0.9999898
Star B
solution_id = 1636148068921376768
designation = Gaia DR3 1963780444991073664
source_id = 1963780444991073664
random_index = 1466087975.0
ref_epoch = 2016.0
ra = 321.68975223322053
ra_error = 0.0068151527
dec = 37.5181428373367
dec_error = 0.007613593
parallax = 1.1065203327800484
parallax_error = 0.010508236
parallax_over_error = 105.3003
pm = 9.616897
pmra = -4.254660799995992
pmra_error = 0.009075202
pmdec = -8.624532450858762
pmdec_error = 0.009471327
ra_dec_corr = -0.20416497
ra_parallax_corr = 0.030224986
ra_pmra_corr = -0.04286251
ra_pmdec_corr = -0.080070846
dec_parallax_corr = 0.086023085
dec_pmra_corr = -0.10044129
dec_pmdec_corr = -0.16140918
parallax_pmra_corr = -0.16030836
parallax_pmdec_corr = -0.008525618
pmra_pmdec_corr = -0.19304205
astrometric_n_obs_al = 526
astrometric_n_obs_ac = 509
astrometric_n_good_obs_al = 526
astrometric_n_bad_obs_al = 0
astrometric_gof_al = -1.4919837
astrometric_chi2_al = 712.9902
astrometric_excess_noise = 0.04564469
astrometric_excess_noise_sig = 3.3867667
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.543352
astrometric_matched_transits = 60
visibility_periods_used = 28
astrometric_sigma5d_max = 0.014057418
matched_transits = 61
new_matched_transits = 21
matched_transits_removed = 0
ipd_gof_harmonic_amplitude = 0.0072836047
ipd_gof_harmonic_phase = 71.35429
ipd_frac_multi_peak = 0
ipd_frac_odd_win = 0
ruwe = 0.9535081
duplicated_source = false
phot_g_n_obs = 516
phot_g_mean_flux = 161126.79144307066
phot_g_mean_flux_error = 22.305397
phot_g_mean_flux_over_error = 7223.6685
phot_g_mean_mag = 12.669448
phot_bp_n_obs = 50
phot_bp_mean_flux = 84418.07884804354
phot_bp_mean_flux_error = 37.976013
phot_bp_mean_flux_over_error = 2222.9316
phot_bp_mean_mag = 13.022453
phot_rp_n_obs = 48
phot_rp_mean_flux = 109740.19840154593
phot_rp_mean_flux_error = 36.808826
phot_rp_mean_flux_over_error = 2981.3555
phot_rp_mean_mag = 12.146981
phot_bp_rp_excess_factor = 1.205003
phot_bp_n_contaminated_transits = 0
phot_bp_n_blended_transits = 1
phot_rp_n_contaminated_transits = 0
phot_rp_n_blended_transits = 0
phot_proc_mode = 0
bp_rp = 0.87547207
bp_g = 0.3530054
g_rp = 0.52246666
radial_velocity = -22.078548
radial_velocity_error = 8.28168
rv_method_used = 1
rv_nb_transits = 23
rv_nb_deblended_transits = 6
rv_visibility_periods_used = 16
rv_expected_sig_to_noise = 21.296373
rv_renormalised_gof = 16.498661
rv_chisq_pvalue = 0.0
rv_time_duration = 896.1901
rv_amplitude_robust = 138.83792
rv_template_teff = 6500.0
rv_template_logg = 2.5
rv_template_fe_h = -0.25
rv_atm_param_origin = 111
grvs_mag = 11.916852
grvs_mag_error = 0.053590577
grvs_mag_nb_transits = 17
phot_variable_flag = NOT_AVAILABLE
l = 84.14287899758247
b = -9.492151995341272
ecl_lon = 341.447868176274
ecl_lat = 48.96802357056896
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 = 1.021383e-13
classprob_dsc_combmod_galaxy = 5.101757e-13
classprob_dsc_combmod_star = 0.9999885
teff_gspphot = 7011.7764
teff_gspphot_lower = 7003.7207
teff_gspphot_upper = 7020.6855
logg_gspphot = 3.9434
logg_gspphot_lower = 3.9351
logg_gspphot_upper = 3.9504
mh_gspphot = -0.2771
mh_gspphot_lower = -0.2838
mh_gspphot_upper = -0.2698
distance_gspphot = 871.4879
distance_gspphot_lower = 864.0762
distance_gspphot_upper = 880.7446
azero_gspphot = 0.9477
azero_gspphot_lower = 0.9433
azero_gspphot_upper = 0.9524
ag_gspphot = 0.8179
ag_gspphot_lower = 0.814
ag_gspphot_upper = 0.8221
ebpminrp_gspphot = 0.4418
ebpminrp_gspphot_lower = 0.4397
ebpminrp_gspphot_upper = 0.444
libname_gspphot = A
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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 22:24:02 +0100
www.stella-vega.de
