Union

01585, 1929 DB, 1929DB, 1937 QF, 1937QF, 1939 CD1, 1939CD1, 1944 DG, 1944DG, 1947 RG, 1947RG, 1949 EE, 1949EE, 1952 QA1, 1952QA1, 1952 SD, 1952SD, J29D00B, J37Q00F, J39C01D, J44D00G, J47R00G, J49E00E, J52Q01A, J52S00D

All data for this body: [vot]

MPC data
Name (number) Union (1585)
a 2.92962
e 0.30854
i / sin(i) 26.1719 / 0.44107
q 2.02571
Q 3.83353
ω 264.2124
Node 150.0683
m 135.5918
n 0.1966
Epoch 2460800.5
nobs 6197
nopp 43
Years observed 1939-2025
rms 0.60
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.931
ep 0.216
sin(ip) 0.462
G 0.150
H 10.310
Mass
D 54.70 0.145
pV 0.034 0.0018
Value
Rotational Period 12.790
Period quality 3-
Spectral Class X
Spectral Class Score 10.000
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.9306 0.2162 0.4621 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
45.60 10.250 10.250 Masiero 2020PSJ.....1....5M NEATM
48.36 11.660 11.660 Masiero 2021PSJ.....2..162M NEATM
50.40 5.040 5.040 Ali-Lagoa 2018A&A...612A..85A NEATM
50.42 1.600 1.600 Tedesco 2002AJ....123.1056T STM
50.68 0.880 0.880 Usui 2011PASJ...63.1117U NEATM
51.42 10.916 10.916 Ryan&Woodward 2010AJ....140..933R IRAS-STM
51.69 10.340 10.340 Ali-Lagoa 2018A&A...612A..85A NEATM
52.06 15.190 15.190 Masiero 2020PSJ.....1....5M NEATM
53.40 0.250 0.250 Masiero 2014ApJ...791..121M NEATM
54.88 6.763 6.763 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
55.27 0.240 0.240 Masiero 2014ApJ...791..121M NEATM
55.42 18.200 18.200 Nugent 2016AJ....152...63N NEATM
56.01 0.292 0.292 Masiero 2011ApJ...741...68M NEATM
58.14 1.157 1.157 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.028 0.0128 0.0128 Masiero 2011ApJ...741...68M NEATM
0.030 0.0100 0.0100 Masiero 2014ApJ...791..121M NEATM
0.030 0.0100 0.0100 Masiero 2014ApJ...791..121M NEATM
0.030 0.0028 0.0028 Masiero 2011ApJ...741...68M NEATM
0.033 0.0080 0.0080 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.036 0.0140 0.0140 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.038 0.0030 0.0030 Tedesco 2002AJ....123.1056T STM
0.040 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.042 0.0340 0.0340 Masiero 2020PSJ.....1....5M NEATM
0.046 0.0240 0.0510 Masiero 2021PSJ.....2..162M NEATM
0.050 0.0250 0.0250 Masiero 2020PSJ.....1....5M NEATM
0.053 0.0210 0.0210 Ali-Lagoa 2018A&A...612A..85A NEATM
0.056 0.0110 0.0110 Ali-Lagoa 2018A&A...612A..85A NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.31 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
12.798 3- Synodic Polakis 2019MPBu...46..287P Lightcurve
12.7988 2 Synodic Pal 2020ApJS..247...26P Lightcurve
12.7992 2 Sidereal Durech 2023A&A...675A..24D Model
12.7993 2 Sidereal Durech 2020A&A...643A..59D Model
12.8 2 Synodic Dose 2023MPBu...50...65D Lightcurve
24.0 1 Synodic Behrend LCDB Lightcurve
9.38 2 Synodic Binzel 1987Icar...72..135B Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
P C 0.880000 0.120000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
X Tholen VIS Lazzaro 2004Icar..172..179L SPEC
X Bus VIS Lazzaro 2004Icar..172..179L SPEC