Gaia Source ID - Star A : 2047944104434180480 Simbad
Gaia Source ID - Star B : 2047944104424289792 Simbad
Observation Epoch : J 2024.721 / 2024-09-21
Angular Separation : 8.478" ± 0.2576 mas
Position Angle : 16.72 ± 0.00140 degreesStar A/B Epoch : J 2016.000 / J 2016.000
Angular Separation : 8.474" ± 0.0252 mas
Position Angle : 16.77 ± 0.00012 degrees
LB of Projected Separation (AU): 3489.12 AU
Spatial Separation (pc) : 17.16 ± 5.34 pc
Spatial Separation (ly) : 55.97 ± 17.41 ly
Proper Motion Angular Difference : 4.76 ± 3.81 degrees
Total Proper Motion Difference : 0.61 ± 0.03 mas/yr
Tangential Velocity Difference : 0.54 ± 0.22 km/s
Radial Velocity Difference : 4.21 ± 2.19 km/s
Space Velocity Difference : 3.08 ± 1.71 km/s
Aladin Lite Sky Atlas
DSS color
DSS blue
2MASS
AllWISE
Gaia Source ID : 2047944104434180480 Simbad
Parallax over error : 161.041 : very good
RUWE : 0.970 : good astrometric fit (single star)
Duplicated source : false : single source
G magnitude : 11.225 : G > 3 mag, photometry reliable
Excess noise : 0.136 : poor fit, model deviation significant
Significance : 29.289 : possible double star, motion, mismatch
BP-RP excess factor : 1.190 : photometry consistent
Visibility periods : 27 : high, indicates well observed star
IPD multi-peak frac : 18% : mulitple peaks detected (possible double)
IDP GoF harmonic amp: 0.003 : unobtrusive (single star source)
Gaia Source ID : 2047944104424289792 Simbad 1.50
Parallax over error : 91.521 : very good
RUWE : 1.500 : poor astrometric fit, (possible double)
Duplicated source : false : single source
G magnitude : 11.273 : G > 3 mag, photometry reliable
Excess noise : 0.251 : poor fit, model deviation significant
Significance : 88.441 : possible double star, motion, mismatch
BP-RP excess factor : 1.189 : photometry consistent
Visibility periods : 26 : high, indicates well observed star
IPD multi-peak frac : 12% : mulitple peaks detected (possible double)
IDP GoF harmonic amp: 0.022 : unobtrusive (single star source)
Spatial separation :
17.16 pc, with an uncertainty range of [ 11.82, 22.50] 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:
2.64 %
Relative Total Proper Motion difference:
7.59 %
Relative Tangential Velocity difference:
3.29 %
Relative Radial Velocity difference:
-16.84 %
Relative Space Velocity difference:
11.48 %
Estimated CPM Probability:
75.74 %
CPM-Based Evidence factor:
0.574
Combined Physical Binding Evidence factor:
0.026
RUWE probability for a binary system (Star A):
Zero
RUWE probability for a binary system (Star B):
Medium
-- 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 8.426 0.003 17.422 0.018
1901.0 8.426 0.003 17.416 0.018
1902.0 8.427 0.003 17.410 0.018
1903.0 8.427 0.003 17.405 0.018
1904.0 8.428 0.003 17.399 0.018
1905.0 8.428 0.003 17.393 0.018
1906.0 8.429 0.003 17.388 0.017
1907.0 8.429 0.003 17.382 0.017
1908.0 8.429 0.003 17.376 0.017
1909.0 8.430 0.003 17.371 0.017
1910.0 8.430 0.003 17.365 0.017
1911.0 8.431 0.003 17.360 0.017
1912.0 8.431 0.003 17.354 0.016
1913.0 8.431 0.003 17.348 0.016
1914.0 8.432 0.003 17.343 0.016
1915.0 8.432 0.003 17.337 0.016
1916.0 8.433 0.003 17.331 0.016
1917.0 8.433 0.003 17.326 0.016
1918.0 8.433 0.003 17.320 0.015
1919.0 8.434 0.003 17.314 0.015
1920.0 8.434 0.003 17.309 0.015
1921.0 8.435 0.003 17.303 0.015
1922.0 8.435 0.003 17.297 0.015
1923.0 8.436 0.003 17.292 0.015
1924.0 8.436 0.003 17.286 0.015
1925.0 8.436 0.003 17.280 0.014
1926.0 8.437 0.003 17.275 0.014
1927.0 8.437 0.003 17.269 0.014
1928.0 8.438 0.003 17.264 0.014
1929.0 8.438 0.003 17.258 0.014
1930.0 8.438 0.003 17.252 0.014
1931.0 8.439 0.002 17.247 0.013
1932.0 8.439 0.002 17.241 0.013
1933.0 8.440 0.002 17.235 0.013
1934.0 8.440 0.002 17.230 0.013
1935.0 8.440 0.002 17.224 0.013
1936.0 8.441 0.002 17.218 0.013
1937.0 8.441 0.002 17.213 0.012
1938.0 8.442 0.002 17.207 0.012
1939.0 8.442 0.002 17.202 0.012
1940.0 8.443 0.002 17.196 0.012
1941.0 8.443 0.002 17.190 0.012
1942.0 8.443 0.002 17.185 0.012
1943.0 8.444 0.002 17.179 0.011
1944.0 8.444 0.002 17.173 0.011
1945.0 8.445 0.002 17.168 0.011
1946.0 8.445 0.002 17.162 0.011
1947.0 8.445 0.002 17.157 0.011
1948.0 8.446 0.002 17.151 0.011
1949.0 8.446 0.002 17.145 0.011
1950.0 8.447 0.002 17.140 0.010
1951.0 8.447 0.002 17.134 0.010
1952.0 8.447 0.002 17.128 0.010
1953.0 8.448 0.002 17.123 0.010
1954.0 8.448 0.002 17.117 0.010
1955.0 8.449 0.002 17.112 0.010
1956.0 8.449 0.002 17.106 0.009
1957.0 8.450 0.002 17.100 0.009
1958.0 8.450 0.002 17.095 0.009
1959.0 8.450 0.002 17.089 0.009
1960.0 8.451 0.002 17.083 0.009
1961.0 8.451 0.002 17.078 0.009
1962.0 8.452 0.002 17.072 0.008
1963.0 8.452 0.002 17.067 0.008
1964.0 8.452 0.002 17.061 0.008
1965.0 8.453 0.001 17.055 0.008
1966.0 8.453 0.001 17.050 0.008
1967.0 8.454 0.001 17.044 0.008
1968.0 8.454 0.001 17.038 0.008
1969.0 8.454 0.001 17.033 0.007
1970.0 8.455 0.001 17.027 0.007
1971.0 8.455 0.001 17.022 0.007
1972.0 8.456 0.001 17.016 0.007
1973.0 8.456 0.001 17.010 0.007
1974.0 8.457 0.001 17.005 0.007
1975.0 8.457 0.001 16.999 0.006
1976.0 8.457 0.001 16.994 0.006
1977.0 8.458 0.001 16.988 0.006
1978.0 8.458 0.001 16.982 0.006
1979.0 8.459 0.001 16.977 0.006
1980.0 8.459 0.001 16.971 0.006
1981.0 8.459 0.001 16.965 0.006
1982.0 8.460 0.001 16.960 0.005
1983.0 8.460 0.001 16.954 0.005
1984.0 8.461 0.001 16.949 0.005
1985.0 8.461 0.001 16.943 0.005
1986.0 8.462 0.001 16.937 0.005
1987.0 8.462 0.001 16.932 0.005
1988.0 8.462 0.001 16.926 0.004
1989.0 8.463 0.001 16.921 0.004
1990.0 8.463 0.001 16.915 0.004
1991.0 8.464 0.001 16.909 0.004
1992.0 8.464 0.001 16.904 0.004
1993.0 8.464 0.001 16.898 0.004
1994.0 8.465 0.001 16.893 0.003
1995.0 8.465 0.001 16.887 0.003
1996.0 8.466 0.001 16.881 0.003
1997.0 8.466 0.001 16.876 0.003
1998.0 8.467 0.001 16.870 0.003
1999.0 8.467 0.001 16.865 0.003
2000.0 8.467 0.000 16.859 0.003
2001.0 8.468 0.000 16.853 0.002
2002.0 8.468 0.000 16.848 0.002
2003.0 8.469 0.000 16.842 0.002
2004.0 8.469 0.000 16.837 0.002
2005.0 8.469 0.000 16.831 0.002
2006.0 8.470 0.000 16.825 0.002
2007.0 8.470 0.000 16.820 0.001
2008.0 8.471 0.000 16.814 0.001
2009.0 8.471 0.000 16.809 0.001
2010.0 8.472 0.000 16.803 0.001
2011.0 8.472 0.000 16.797 0.001
2012.0 8.472 0.000 16.792 0.001
2013.0 8.473 0.000 16.786 0.000
2014.0 8.473 0.000 16.781 0.000
2015.0 8.474 0.000 16.775 0.000
2016.0 8.474 0.000 16.769 0.000
2017.0 8.474 0.000 16.764 0.000
2018.0 8.475 0.000 16.758 0.000
2019.0 8.475 0.000 16.753 0.000
2020.0 8.476 0.000 16.747 0.001
2021.0 8.476 0.000 16.741 0.001
2022.0 8.477 0.000 16.736 0.001
2023.0 8.477 0.000 16.730 0.001
2024.0 8.477 0.000 16.725 0.001
2025.0 8.478 0.000 16.719 0.001
2026.0 8.478 0.000 16.714 0.002
2027.0 8.479 0.000 16.708 0.002
2028.0 8.479 0.000 16.702 0.002
2029.0 8.480 0.000 16.697 0.002
2030.0 8.480 0.000 16.691 0.002
2031.0 8.480 0.000 16.686 0.002
2032.0 8.481 0.000 16.680 0.003
2033.0 8.481 0.001 16.674 0.003
2034.0 8.482 0.001 16.669 0.003
2035.0 8.482 0.001 16.663 0.003
2036.0 8.482 0.001 16.658 0.003
2037.0 8.483 0.001 16.652 0.003
2038.0 8.483 0.001 16.647 0.003
2039.0 8.484 0.001 16.641 0.004
2040.0 8.484 0.001 16.635 0.004
2041.0 8.485 0.001 16.630 0.004
2042.0 8.485 0.001 16.624 0.004
2043.0 8.485 0.001 16.619 0.004
2044.0 8.486 0.001 16.613 0.004
2045.0 8.486 0.001 16.608 0.005
2046.0 8.487 0.001 16.602 0.005
2047.0 8.487 0.001 16.596 0.005
2048.0 8.488 0.001 16.591 0.005
2049.0 8.488 0.001 16.585 0.005
2050.0 8.488 0.001 16.580 0.005
2051.0 8.489 0.001 16.574 0.005
2052.0 8.489 0.001 16.569 0.006
2053.0 8.490 0.001 16.563 0.006
2054.0 8.490 0.001 16.557 0.006
2055.0 8.490 0.001 16.552 0.006
2056.0 8.491 0.001 16.546 0.006
2057.0 8.491 0.001 16.541 0.006
2058.0 8.492 0.001 16.535 0.007
2059.0 8.492 0.001 16.530 0.007
2060.0 8.493 0.001 16.524 0.007
2061.0 8.493 0.001 16.518 0.007
2062.0 8.493 0.001 16.513 0.007
2063.0 8.494 0.001 16.507 0.007
2064.0 8.494 0.001 16.502 0.008
2065.0 8.495 0.001 16.496 0.008
2066.0 8.495 0.001 16.491 0.008
2067.0 8.496 0.001 16.485 0.008
2068.0 8.496 0.002 16.479 0.008
2069.0 8.496 0.002 16.474 0.008
2070.0 8.497 0.002 16.468 0.008
2071.0 8.497 0.002 16.463 0.009
2072.0 8.498 0.002 16.457 0.009
2073.0 8.498 0.002 16.452 0.009
2074.0 8.498 0.002 16.446 0.009
2075.0 8.499 0.002 16.441 0.009
2076.0 8.499 0.002 16.435 0.009
2077.0 8.500 0.002 16.429 0.010
2078.0 8.500 0.002 16.424 0.010
2079.0 8.501 0.002 16.418 0.010
2080.0 8.501 0.002 16.413 0.010
2081.0 8.501 0.002 16.407 0.010
2082.0 8.502 0.002 16.402 0.010
2083.0 8.502 0.002 16.396 0.010
2084.0 8.503 0.002 16.391 0.011
2085.0 8.503 0.002 16.385 0.011
2086.0 8.504 0.002 16.379 0.011
2087.0 8.504 0.002 16.374 0.011
2088.0 8.504 0.002 16.368 0.011
2089.0 8.505 0.002 16.363 0.011
2090.0 8.505 0.002 16.357 0.012
2091.0 8.506 0.002 16.352 0.012
2092.0 8.506 0.002 16.346 0.012
2093.0 8.507 0.002 16.341 0.012
2094.0 8.507 0.002 16.335 0.012
2095.0 8.507 0.002 16.329 0.012
2096.0 8.508 0.002 16.324 0.013
2097.0 8.508 0.002 16.318 0.013
2098.0 8.509 0.002 16.313 0.013
2099.0 8.509 0.002 16.307 0.013
2100.0 8.510 0.002 16.302 0.013
WDS ID Discovr Comp # Sep PA Epoch Obs Telescope Camera Note
-------------------------------------------------------------------------------------------------
19457+3612 ALI 161 AB 1 8.49" 16.9° B2024.685 HWI 120/900 APO ASI678MM
-- Image of ALI-161-AB-taken with Equinox 120/900 APO --
wds_id : 19457+3612
discoverer_code : ALI
discoverer_number : 161
discoverer_components : AB
date_first : 1933
date_last : 2024
num_of_obs : 19
pa_first : 18
pa_last : 17
sep_first : 8.5
sep_last : 8.5
mag_primary : 10.84
mag_secondary : 11.24
spectral_type :
primary_proper_motion_RA : 9
primary_proper_motion_DEC : 0
secondary_proper_motion_RA : 11
secondary_proper_motion_DEC : 3
dm_number :
notes : N
precise_coordinate : 194541.94+361140.4
WDS Notes:
----------
N: Notes found in WDSNOT MEMO of WDS
Click to expand/collapse the Gaia Input Data:
Star A
solution_id = 1636148068921376768
designation = Gaia DR3 2047944104434180480
source_id = 2047944104434180480
random_index = 539323806.0
ref_epoch = 2016.0
ra = 296.42480594758814
ra_error = 0.011669306
dec = 36.1945518877303
dec_error = 0.013241229
parallax = 2.4287136090234114
parallax_error = 0.01508131
parallax_over_error = 161.04129
pm = 8.687444
pmra = 8.67816890437474
pmra_error = 0.014961727
pmdec = 0.4013348505050241
pmdec_error = 0.015643694
ra_dec_corr = -0.089091025
ra_parallax_corr = -0.035814445
ra_pmra_corr = -0.15979534
ra_pmdec_corr = -0.024957448
dec_parallax_corr = 0.21936782
dec_pmra_corr = -0.063397504
dec_pmdec_corr = -0.24825615
parallax_pmra_corr = -0.13962026
parallax_pmdec_corr = -0.13145788
pmra_pmdec_corr = -0.062275205
astrometric_n_obs_al = 426
astrometric_n_obs_ac = 426
astrometric_n_good_obs_al = 420
astrometric_n_bad_obs_al = 6
astrometric_gof_al = -0.93633616
astrometric_chi2_al = 1519.2693
astrometric_excess_noise = 0.1357183
astrometric_excess_noise_sig = 29.288546
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.6090045
astrometric_matched_transits = 48
visibility_periods_used = 27
astrometric_sigma5d_max = 0.022226403
matched_transits = 51
new_matched_transits = 26
matched_transits_removed = 1
ipd_gof_harmonic_amplitude = 0.002803331
ipd_gof_harmonic_phase = 2.1944213
ipd_frac_multi_peak = 18
ipd_frac_odd_win = 0
ruwe = 0.96688163
duplicated_source = false
phot_g_n_obs = 410
phot_g_mean_flux = 609189.5884665267
phot_g_mean_flux_error = 181.17123
phot_g_mean_flux_over_error = 3362.5073
phot_g_mean_mag = 11.225486
phot_bp_n_obs = 45
phot_bp_mean_flux = 361711.3742078487
phot_bp_mean_flux_error = 198.24722
phot_bp_mean_flux_over_error = 1824.547
phot_bp_mean_mag = 11.4426365
phot_rp_n_obs = 44
phot_rp_mean_flux = 363117.94785198866
phot_rp_mean_flux_error = 164.94998
phot_rp_mean_flux_over_error = 2201.382
phot_rp_mean_mag = 10.847776
phot_bp_rp_excess_factor = 1.1898255
phot_bp_n_contaminated_transits = 0
phot_bp_n_blended_transits = 45
phot_rp_n_contaminated_transits = 0
phot_rp_n_blended_transits = 44
phot_proc_mode = 0
bp_rp = 0.5948601
bp_g = 0.21715069
g_rp = 0.3777094
radial_velocity = -20.78884
radial_velocity_error = 2.1367745
rv_method_used = 1
rv_nb_transits = 7
rv_nb_deblended_transits = 4
rv_visibility_periods_used = 5
rv_expected_sig_to_noise = 27.998941
rv_renormalised_gof = 2.3878045
rv_chisq_pvalue = 0.19414641
rv_time_duration = 755.83093
rv_amplitude_robust = 11.323196
rv_template_teff = 6500.0
rv_template_logg = 4.0
rv_template_fe_h = 0.75
rv_atm_param_origin = 444
grvs_mag = 10.715357
grvs_mag_error = 0.022302061
grvs_mag_nb_transits = 3
phot_variable_flag = NOT_AVAILABLE
l = 70.8845084904917
b = 5.785632043080152
ecl_lon = 309.98967698905847
ecl_lat = 56.024091820899514
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 = 1.0819808e-13
classprob_dsc_combmod_galaxy = 5.4044394e-13
classprob_dsc_combmod_star = 0.9993886
teff_gspphot = 6527.944
teff_gspphot_lower = 6514.0254
teff_gspphot_upper = 6543.099
logg_gspphot = 4.1682
logg_gspphot_lower = 4.1596
logg_gspphot_upper = 4.1777
mh_gspphot = -0.0501
mh_gspphot_lower = -0.0623
mh_gspphot_upper = -0.0392
distance_gspphot = 399.0611
distance_gspphot_lower = 395.8501
distance_gspphot_upper = 402.4941
azero_gspphot = 0.0446
azero_gspphot_lower = 0.0369
azero_gspphot_upper = 0.0526
ag_gspphot = 0.0389
ag_gspphot_lower = 0.0322
ag_gspphot_upper = 0.0459
ebpminrp_gspphot = 0.0209
ebpminrp_gspphot_lower = 0.0173
ebpminrp_gspphot_upper = 0.0247
libname_gspphot = MARCS
Star B
solution_id = 1636148068921376768
designation = Gaia DR3 2047944104424289792
source_id = 2047944104424289792
random_index = 546354043.0
ref_epoch = 2016.0
ra = 296.42564753125623
ra_error = 0.019077552
dec = 36.19680568936915
dec_error = 0.022117762
parallax = 2.3315376303294193
parallax_error = 0.025475428
parallax_over_error = 91.52104
pm = 8.074273
pmra = 8.00694246132366
pmra_error = 0.024614641
pmdec = 1.040556558502618
pmdec_error = 0.025460454
ra_dec_corr = -0.13862742
ra_parallax_corr = -0.1112184
ra_pmra_corr = -0.11700062
ra_pmdec_corr = -0.031953607
dec_parallax_corr = 0.27082694
dec_pmra_corr = -0.09964361
dec_pmdec_corr = -0.23832732
parallax_pmra_corr = -0.18836391
parallax_pmdec_corr = -0.104973875
pmra_pmdec_corr = -0.08076198
astrometric_n_obs_al = 407
astrometric_n_obs_ac = 407
astrometric_n_good_obs_al = 405
astrometric_n_bad_obs_al = 2
astrometric_gof_al = 13.103034
astrometric_chi2_al = 3598.0044
astrometric_excess_noise = 0.25143725
astrometric_excess_noise_sig = 88.44052
astrometric_params_solved = 31
astrometric_primary_flag = false
nu_eff_used_in_astrometry = 1.6028459
astrometric_matched_transits = 46
visibility_periods_used = 26
astrometric_sigma5d_max = 0.036351573
matched_transits = 50
new_matched_transits = 24
matched_transits_removed = 0
ipd_gof_harmonic_amplitude = 0.022101337
ipd_gof_harmonic_phase = 135.18997
ipd_frac_multi_peak = 12
ipd_frac_odd_win = 0
ruwe = 1.4964217
duplicated_source = false
phot_g_n_obs = 403
phot_g_mean_flux = 583162.289382513
phot_g_mean_flux_error = 215.0553
phot_g_mean_flux_over_error = 2711.6853
phot_g_mean_mag = 11.272893
phot_bp_n_obs = 45
phot_bp_mean_flux = 342676.4106317171
phot_bp_mean_flux_error = 179.20497
phot_bp_mean_flux_over_error = 1912.2037
phot_bp_mean_mag = 11.501331
phot_rp_n_obs = 46
phot_rp_mean_flux = 350880.29000368563
phot_rp_mean_flux_error = 103.83657
phot_rp_mean_flux_over_error = 3379.1592
phot_rp_mean_mag = 10.884998
phot_bp_rp_excess_factor = 1.189303
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 = 0.616333
bp_g = 0.22843838
g_rp = 0.38789463
radial_velocity = -24.997206
radial_velocity_error = 0.49580505
rv_method_used = 1
rv_nb_transits = 18
rv_nb_deblended_transits = 12
rv_visibility_periods_used = 14
rv_expected_sig_to_noise = 43.510704
rv_renormalised_gof = -0.39640415
rv_chisq_pvalue = 0.7152044
rv_time_duration = 855.88275
rv_amplitude_robust = 6.2999554
rv_template_teff = 6250.0
rv_template_logg = 4.0
rv_template_fe_h = -0.5
rv_atm_param_origin = 111
vbroad = 10.459369
vbroad_error = 7.2263083
vbroad_nb_transits = 6
grvs_mag = 10.7373085
grvs_mag_error = 0.00853854
grvs_mag_nb_transits = 6
phot_variable_flag = VARIABLE
l = 70.8868154782441
b = 5.786154326102762
ecl_lon = 309.992107298264
ecl_lat = 56.02601441405653
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 = 1.07193165e-13
classprob_dsc_combmod_galaxy = 5.3542446e-13
classprob_dsc_combmod_star = 0.99948806
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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 22:20:21 +0100
www.stella-vega.de
