Gaia Source ID - Star A : 2191624027639930112 Simbad
Gaia Source ID - Star B : 2191624027639931008 Simbad
Observation Epoch : J 2025.715 / 2025-09-19
Angular Separation : 10.522" ± 0.6341 mas
Position Angle : 171.18 ± 0.00190 degreesStar A/B Epoch : J 2016.000 / J 2016.000
Angular Separation : 10.603" ± 0.0544 mas
Position Angle : 172.29 ± 0.00015 degrees
LB of Projected Separation (AU): 2998.74 AU
Spatial Separation (pc) : 649.45 ± 12.18 pc
Spatial Separation (ly) : 2118.23 ± 39.73 ly
Proper Motion Angular Difference : 24.30 ± 1.18 degrees
Total Proper Motion Difference : 22.08 ± 0.07 mas/yr
Tangential Velocity Difference : 14.19 ± 0.67 km/s
Aladin Lite Sky Atlas
DSS color
DSS blue
2MASS
AllWISE
Gaia Source ID : 2191624027639930112 Simbad
Parallax over error : 59.668 : very good
RUWE : 1.190 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 4.977 : G > 3 mag, photometry reliable
Excess noise : 0.514 : poor fit, model deviation significant
Significance : 306.482 : possible double star, motion, mismatch
BP-RP excess factor : 1.431 : photometry inconsistent
Visibility periods : 22 : high, indicates well observed star
IPD multi-peak frac : 3% : mulitple peaks detected (possible double)
IDP GoF harmonic amp: 0.016 : unobtrusive (single star source)
Gaia Source ID : 2191624027639931008 Simbad
Parallax over error : 83.070 : very good
RUWE : 1.030 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 10.869 : G > 3 mag, photometry reliable
Excess noise : 0.099 : poor fit, model deviation significant
Significance : 12.245 : possible double star, motion, mismatch
BP-RP excess factor : 1.190 : photometry consistent
Visibility periods : 25 : high, indicates well observed star
IPD multi-peak frac : 0% : single peak detected
IDP GoF harmonic amp: 0.032 : unobtrusive (single star source)
Spatial separation :
649.45 pc, with an uncertainty range of [ 637.27, 661.63] 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:
13.50 %
Relative Total Proper Motion difference:
441.13 %
Relative Tangential Velocity difference:
64.16 %
Estimated CPM Probability:
2.82 %
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 11.846 0.008 184.123 0.020
1901.0 11.833 0.008 184.032 0.020
1902.0 11.821 0.007 183.941 0.020
1903.0 11.808 0.007 183.850 0.020
1904.0 11.796 0.007 183.758 0.019
1905.0 11.783 0.007 183.667 0.019
1906.0 11.770 0.007 183.575 0.019
1907.0 11.758 0.007 183.483 0.019
1908.0 11.746 0.007 183.391 0.019
1909.0 11.733 0.007 183.299 0.019
1910.0 11.721 0.007 183.206 0.019
1911.0 11.708 0.007 183.113 0.018
1912.0 11.696 0.007 183.020 0.018
1913.0 11.684 0.007 182.927 0.018
1914.0 11.672 0.007 182.834 0.018
1915.0 11.659 0.007 182.741 0.018
1916.0 11.647 0.007 182.647 0.018
1917.0 11.635 0.006 182.553 0.017
1918.0 11.623 0.006 182.459 0.017
1919.0 11.611 0.006 182.365 0.017
1920.0 11.599 0.006 182.270 0.017
1921.0 11.587 0.006 182.175 0.017
1922.0 11.575 0.006 182.081 0.017
1923.0 11.563 0.006 181.985 0.016
1924.0 11.551 0.006 181.890 0.016
1925.0 11.539 0.006 181.795 0.016
1926.0 11.527 0.006 181.699 0.016
1927.0 11.515 0.006 181.603 0.016
1928.0 11.503 0.006 181.507 0.016
1929.0 11.492 0.006 181.411 0.015
1930.0 11.480 0.006 181.314 0.015
1931.0 11.468 0.006 181.218 0.015
1932.0 11.457 0.006 181.121 0.015
1933.0 11.445 0.005 181.024 0.015
1934.0 11.433 0.005 180.927 0.015
1935.0 11.422 0.005 180.829 0.014
1936.0 11.410 0.005 180.732 0.014
1937.0 11.399 0.005 180.634 0.014
1938.0 11.387 0.005 180.536 0.014
1939.0 11.376 0.005 180.437 0.014
1940.0 11.364 0.005 180.339 0.014
1941.0 11.353 0.005 180.240 0.013
1942.0 11.342 0.005 180.142 0.013
1943.0 11.330 0.005 180.043 0.013
1944.0 11.319 0.005 179.943 0.013
1945.0 11.308 0.005 179.844 0.013
1946.0 11.297 0.005 179.744 0.013
1947.0 11.285 0.005 179.645 0.012
1948.0 11.274 0.004 179.545 0.012
1949.0 11.263 0.004 179.444 0.012
1950.0 11.252 0.004 179.344 0.012
1951.0 11.241 0.004 179.243 0.012
1952.0 11.230 0.004 179.143 0.012
1953.0 11.219 0.004 179.042 0.011
1954.0 11.208 0.004 178.940 0.011
1955.0 11.197 0.004 178.839 0.011
1956.0 11.186 0.004 178.737 0.011
1957.0 11.176 0.004 178.636 0.011
1958.0 11.165 0.004 178.534 0.011
1959.0 11.154 0.004 178.431 0.010
1960.0 11.143 0.004 178.329 0.010
1961.0 11.133 0.004 178.227 0.010
1962.0 11.122 0.004 178.124 0.010
1963.0 11.111 0.003 178.021 0.010
1964.0 11.101 0.003 177.918 0.010
1965.0 11.090 0.003 177.814 0.009
1966.0 11.080 0.003 177.711 0.009
1967.0 11.069 0.003 177.607 0.009
1968.0 11.059 0.003 177.503 0.009
1969.0 11.049 0.003 177.399 0.009
1970.0 11.038 0.003 177.295 0.009
1971.0 11.028 0.003 177.190 0.008
1972.0 11.018 0.003 177.085 0.008
1973.0 11.007 0.003 176.980 0.008
1974.0 10.997 0.003 176.875 0.008
1975.0 10.987 0.003 176.770 0.008
1976.0 10.977 0.003 176.664 0.007
1977.0 10.967 0.003 176.559 0.007
1978.0 10.957 0.002 176.453 0.007
1979.0 10.947 0.002 176.347 0.007
1980.0 10.937 0.002 176.240 0.007
1981.0 10.927 0.002 176.134 0.007
1982.0 10.917 0.002 176.027 0.006
1983.0 10.907 0.002 175.920 0.006
1984.0 10.897 0.002 175.813 0.006
1985.0 10.887 0.002 175.706 0.006
1986.0 10.878 0.002 175.599 0.006
1987.0 10.868 0.002 175.491 0.005
1988.0 10.858 0.002 175.383 0.005
1989.0 10.848 0.002 175.275 0.005
1990.0 10.839 0.002 175.167 0.005
1991.0 10.829 0.002 175.059 0.005
1992.0 10.820 0.002 174.950 0.005
1993.0 10.810 0.002 174.841 0.004
1994.0 10.801 0.001 174.732 0.004
1995.0 10.791 0.001 174.623 0.004
1996.0 10.782 0.001 174.514 0.004
1997.0 10.773 0.001 174.404 0.004
1998.0 10.763 0.001 174.294 0.003
1999.0 10.754 0.001 174.185 0.003
2000.0 10.745 0.001 174.074 0.003
2001.0 10.736 0.001 173.964 0.003
2002.0 10.727 0.001 173.854 0.003
2003.0 10.718 0.001 173.743 0.003
2004.0 10.709 0.001 173.632 0.002
2005.0 10.700 0.001 173.521 0.002
2006.0 10.691 0.001 173.410 0.002
2007.0 10.682 0.001 173.298 0.002
2008.0 10.673 0.001 173.187 0.002
2009.0 10.664 0.000 173.075 0.001
2010.0 10.655 0.000 172.963 0.001
2011.0 10.646 0.000 172.851 0.001
2012.0 10.638 0.000 172.738 0.001
2013.0 10.629 0.000 172.626 0.001
2014.0 10.620 0.000 172.513 0.000
2015.0 10.612 0.000 172.400 0.000
2016.0 10.603 0.000 172.287 0.000
2017.0 10.595 0.000 172.174 0.000
2018.0 10.586 0.000 172.060 0.000
2019.0 10.578 0.000 171.947 0.001
2020.0 10.569 0.000 171.833 0.001
2021.0 10.561 0.000 171.719 0.001
2022.0 10.553 0.000 171.605 0.001
2023.0 10.544 0.000 171.490 0.001
2024.0 10.536 0.001 171.376 0.002
2025.0 10.528 0.001 171.261 0.002
2026.0 10.520 0.001 171.146 0.002
2027.0 10.512 0.001 171.031 0.002
2028.0 10.504 0.001 170.916 0.002
2029.0 10.496 0.001 170.801 0.003
2030.0 10.488 0.001 170.685 0.003
2031.0 10.480 0.001 170.569 0.003
2032.0 10.472 0.001 170.453 0.003
2033.0 10.464 0.001 170.337 0.003
2034.0 10.456 0.001 170.221 0.004
2035.0 10.448 0.001 170.104 0.004
2036.0 10.441 0.001 169.988 0.004
2037.0 10.433 0.001 169.871 0.004
2038.0 10.425 0.001 169.754 0.004
2039.0 10.418 0.001 169.637 0.005
2040.0 10.410 0.002 169.519 0.005
2041.0 10.403 0.002 169.402 0.005
2042.0 10.395 0.002 169.284 0.005
2043.0 10.388 0.002 169.166 0.006
2044.0 10.380 0.002 169.048 0.006
2045.0 10.373 0.002 168.930 0.006
2046.0 10.366 0.002 168.812 0.006
2047.0 10.359 0.002 168.693 0.006
2048.0 10.351 0.002 168.575 0.007
2049.0 10.344 0.002 168.456 0.007
2050.0 10.337 0.002 168.337 0.007
2051.0 10.330 0.002 168.218 0.007
2052.0 10.323 0.002 168.098 0.007
2053.0 10.316 0.002 167.979 0.008
2054.0 10.309 0.002 167.859 0.008
2055.0 10.302 0.003 167.739 0.008
2056.0 10.295 0.003 167.620 0.008
2057.0 10.289 0.003 167.499 0.009
2058.0 10.282 0.003 167.379 0.009
2059.0 10.275 0.003 167.259 0.009
2060.0 10.269 0.003 167.138 0.009
2061.0 10.262 0.003 167.017 0.009
2062.0 10.255 0.003 166.896 0.010
2063.0 10.249 0.003 166.775 0.010
2064.0 10.242 0.003 166.654 0.010
2065.0 10.236 0.003 166.533 0.010
2066.0 10.230 0.003 166.411 0.011
2067.0 10.223 0.003 166.290 0.011
2068.0 10.217 0.003 166.168 0.011
2069.0 10.211 0.003 166.046 0.011
2070.0 10.205 0.003 165.924 0.012
2071.0 10.198 0.004 165.801 0.012
2072.0 10.192 0.004 165.679 0.012
2073.0 10.186 0.004 165.556 0.012
2074.0 10.180 0.004 165.434 0.012
2075.0 10.174 0.004 165.311 0.013
2076.0 10.168 0.004 165.188 0.013
2077.0 10.163 0.004 165.065 0.013
2078.0 10.157 0.004 164.941 0.013
2079.0 10.151 0.004 164.818 0.014
2080.0 10.145 0.004 164.695 0.014
2081.0 10.140 0.004 164.571 0.014
2082.0 10.134 0.004 164.447 0.014
2083.0 10.128 0.004 164.323 0.015
2084.0 10.123 0.004 164.199 0.015
2085.0 10.117 0.004 164.075 0.015
2086.0 10.112 0.004 163.950 0.015
2087.0 10.106 0.005 163.826 0.016
2088.0 10.101 0.005 163.701 0.016
2089.0 10.096 0.005 163.576 0.016
2090.0 10.091 0.005 163.451 0.016
2091.0 10.085 0.005 163.326 0.017
2092.0 10.080 0.005 163.201 0.017
2093.0 10.075 0.005 163.076 0.017
2094.0 10.070 0.005 162.951 0.017
2095.0 10.065 0.005 162.825 0.018
2096.0 10.060 0.005 162.699 0.018
2097.0 10.055 0.005 162.574 0.018
2098.0 10.050 0.005 162.448 0.018
2099.0 10.046 0.005 162.322 0.019
2100.0 10.041 0.005 162.195 0.019
WDS ID Discovr Comp # Sep PA Epoch Obs Telescope Camera Note
--------------------------------------------------------------------------------------------------
21274+5945 STT 440 1 10.40" 171.2° B2025.720 HWI 120/900 APO ASI678MM
-- Image of STT-440-taken with Equinox 120/900 APO --
wds_id : 21274+5945
discoverer_code : STT
discoverer_number : 440
discoverer_components :
date_first : 1828
date_last : 1996
num_of_obs : 18
pa_first : 187
pa_last : 175
sep_first : 13.0
sep_last : 8.9
mag_primary : 6.34
mag_secondary : 10.42
spectral_type : M3III
primary_proper_motion_RA : -22
primary_proper_motion_DEC : -16
secondary_proper_motion_RA :
secondary_proper_motion_DEC :
dm_number : +59 2383
notes :
precise_coordinate : 212725.28+594500.3
Click to expand/collapse the Gaia Input Data:
Star A
solution_id = 1636148068921376768
designation = Gaia DR3 2191624027639930112
source_id = 2191624027639930112
random_index = 1196677141.0
ref_epoch = 2016.0
ra = 321.85512481548267
ra_error = 0.052138943
dec = 59.75000779203154
dec_error = 0.05355642
parallax = 3.53584315071119
parallax_error = 0.059258696
parallax_over_error = 59.66792
pm = 27.08673
pmra = -22.152959379488564
pmra_error = 0.06882355
pmdec = -15.586446664043347
pmdec_error = 0.064178
ra_dec_corr = 0.019804936
ra_parallax_corr = -0.060804807
ra_pmra_corr = -0.09543098
ra_pmdec_corr = -0.09671137
dec_parallax_corr = 0.30447662
dec_pmra_corr = -0.16132692
dec_pmdec_corr = -0.23164049
parallax_pmra_corr = -0.21353397
parallax_pmdec_corr = -0.11203557
pmra_pmdec_corr = 0.022002952
astrometric_n_obs_al = 232
astrometric_n_obs_ac = 232
astrometric_n_good_obs_al = 222
astrometric_n_bad_obs_al = 10
astrometric_gof_al = 3.801624
astrometric_chi2_al = 10253.604
astrometric_excess_noise = 0.51376957
astrometric_excess_noise_sig = 306.48172
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.2805983
astrometric_matched_transits = 26
visibility_periods_used = 22
astrometric_sigma5d_max = 0.097109295
matched_transits = 42
new_matched_transits = 13
matched_transits_removed = 27
ipd_gof_harmonic_amplitude = 0.016382635
ipd_gof_harmonic_phase = 156.32599
ipd_frac_multi_peak = 3
ipd_frac_odd_win = 0
ruwe = 1.1862997
duplicated_source = false
phot_g_n_obs = 334
phot_g_mean_flux = 192332844.90536496
phot_g_mean_flux_error = 295310.28
phot_g_mean_flux_over_error = 651.2907
phot_g_mean_mag = 4.9772334
phot_bp_n_obs = 40
phot_bp_mean_flux = 37539699.59204062
phot_bp_mean_flux_error = 244253.56
phot_bp_mean_flux_over_error = 153.69151
phot_bp_mean_mag = 6.402315
phot_rp_n_obs = 40
phot_rp_mean_flux = 237745082.49724853
phot_rp_mean_flux_error = 698501.5
phot_rp_mean_flux_over_error = 340.36444
phot_rp_mean_mag = 3.8076167
phot_bp_rp_excess_factor = 1.4312936
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 = 2.5946984
bp_g = 1.4250817
g_rp = 1.1696167
radial_velocity = -20.335342
radial_velocity_error = 0.17855789
rv_method_used = 1
rv_nb_transits = 16
rv_nb_deblended_transits = 0
rv_visibility_periods_used = 13
rv_expected_sig_to_noise = 1701.9381
rv_chisq_pvalue = 4.592304e-09
rv_time_duration = 995.64996
rv_amplitude_robust = 1.7866364
rv_template_teff = 3800.0
rv_template_logg = 1.0
rv_template_fe_h = 0.0
rv_atm_param_origin = 440
vbroad = 10.614947
vbroad_error = 0.32189515
vbroad_nb_transits = 12
grvs_mag = 3.3285599
grvs_mag_error = 0.008354564
grvs_mag_nb_transits = 16
phot_variable_flag = VARIABLE
l = 99.72839825811977
b = 6.417011021960478
ecl_lon = 8.347381401604949
ecl_lat = 66.3945632655491
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 = 1.0493143e-13
classprob_dsc_combmod_galaxy = 5.241272e-13
classprob_dsc_combmod_star = 0.999712
Star B
solution_id = 1636148068921376768
designation = Gaia DR3 2191624027639931008
source_id = 2191624027639931008
random_index = 329110246.0
ref_epoch = 2016.0
ra = 321.8559093914494
ra_error = 0.012121744
dec = 59.7470891382565
dec_error = 0.011347423
parallax = 1.072651820508784
parallax_error = 0.012912582
parallax_over_error = 83.07029
pm = 5.005594
pmra = -2.5460630572231184
pmra_error = 0.016479459
pmdec = -4.309701953045426
pmdec_error = 0.013468789
ra_dec_corr = -0.060472008
ra_parallax_corr = -0.034111474
ra_pmra_corr = -0.06158
ra_pmdec_corr = -0.08258511
dec_parallax_corr = 0.15348278
dec_pmra_corr = -0.113525726
dec_pmdec_corr = -0.1522834
parallax_pmra_corr = -0.108922444
parallax_pmdec_corr = -0.041067842
pmra_pmdec_corr = -0.021412637
astrometric_n_obs_al = 329
astrometric_n_obs_ac = 329
astrometric_n_good_obs_al = 328
astrometric_n_bad_obs_al = 1
astrometric_gof_al = 0.88528967
astrometric_chi2_al = 927.6836
astrometric_excess_noise = 0.09877405
astrometric_excess_noise_sig = 12.244806
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.6266215
astrometric_matched_transits = 37
visibility_periods_used = 25
astrometric_sigma5d_max = 0.022868415
matched_transits = 63
new_matched_transits = 20
matched_transits_removed = 2
ipd_gof_harmonic_amplitude = 0.031912513
ipd_gof_harmonic_phase = 155.92789
ipd_frac_multi_peak = 0
ipd_frac_odd_win = 0
ruwe = 1.033989
duplicated_source = false
phot_g_n_obs = 463
phot_g_mean_flux = 846332.4052155352
phot_g_mean_flux_error = 233.76088
phot_g_mean_flux_over_error = 3620.505
phot_g_mean_mag = 10.868514
phot_bp_n_obs = 44
phot_bp_mean_flux = 518424.44989352534
phot_bp_mean_flux_error = 262.4442
phot_bp_mean_flux_over_error = 1975.3701
phot_bp_mean_mag = 11.051828
phot_rp_n_obs = 42
phot_rp_mean_flux = 488652.39656870137
phot_rp_mean_flux_error = 332.6246
phot_rp_mean_flux_over_error = 1469.0807
phot_rp_mean_mag = 10.525395
phot_bp_rp_excess_factor = 1.1899307
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 = 0.526433
bp_g = 0.18331432
g_rp = 0.34311867
phot_variable_flag = NOT_AVAILABLE
l = 99.72663951714122
b = 6.414640319852307
ecl_lon = 8.342303910544159
ecl_lat = 66.39243242535244
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 = 4.3478882e-10
classprob_dsc_combmod_galaxy = 5.1169783e-13
classprob_dsc_combmod_star = 0.99996424
teff_gspphot = 13242.812
teff_gspphot_lower = 13191.266
teff_gspphot_upper = 13287.175
logg_gspphot = 3.9651
logg_gspphot_lower = 3.9564
logg_gspphot_upper = 3.9744
mh_gspphot = -0.9501
mh_gspphot_lower = -0.9927
mh_gspphot_upper = -0.802
distance_gspphot = 950.3234
distance_gspphot_lower = 939.5119
distance_gspphot_upper = 960.3426
azero_gspphot = 1.3596
azero_gspphot_lower = 1.358
azero_gspphot_upper = 1.3612
ag_gspphot = 1.2736
ag_gspphot_lower = 1.272
ag_gspphot_upper = 1.2752
ebpminrp_gspphot = 0.6882
ebpminrp_gspphot_lower = 0.6873
ebpminrp_gspphot_upper = 0.6892
libname_gspphot = A
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 22:42:11 +0100
www.stella-vega.de
