Ounas

01473, 1938 UT, 1938UT, 1950 NZ, 1950NZ, 1950 PB1, 1950PB1, J38U00T, J50N00Z, J50P01B

All data for this body: [vot]

MPC data
Name (number) Ounas (1473)
a 2.57456
e 0.23667
i / sin(i) 13.6458 / 0.23592
q 1.96524
Q 3.18387
ω 129.3589
Node 216.4527
m 15.7658
n 0.2386
Epoch 2460800.5
nobs 7328
nopp 36
Years observed 1938-2025
rms 0.51
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.575
ep 0.181
sin(ip) 0.243
G 0.150
H 11.900
Mass
D 19.37 0.064
pV 0.098 0.0050
Value
Rotational Period 139.000
Period quality 3
Spectral Class K
Spectral Class Score 2.011
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5747 0.1815 0.2434 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
14.79 3.321 3.321 Masiero 2017AJ....154..168M NEATM
16.56 3.920 3.920 Masiero 2021PSJ.....2..162M NEATM
17.03 1.284 1.284 Ryan&Woodward 2010AJ....140..933R IRAS-STM
17.42 1.380 1.380 Usui 2011PASJ...63.1117U NEATM
17.58 0.700 0.700 Tedesco 2002AJ....123.1056T STM
17.87 3.570 3.570 Ali-Lagoa 2018A&A...612A..85A NEATM
18.16 0.110 0.110 Masiero 2014ApJ...791..121M NEATM
19.77 1.555 1.555 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
20.03 0.079 0.079 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.084 0.0080 0.0080 Masiero 2011ApJ...741...68M NEATM
0.091 0.0139 0.0139 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.103 0.0420 0.0720 Masiero 2021PSJ.....2..162M NEATM
0.109 0.0090 0.0090 Tedesco 2002AJ....123.1056T STM
0.110 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM
0.114 0.0461 0.0461 Masiero 2017AJ....154..168M NEATM
0.117 0.0470 0.0470 Ali-Lagoa 2018A&A...612A..85A NEATM
0.123 0.0205 0.0205 Ryan&Woodward 2010AJ....140..933R IRAS-STM
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
11.90 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
139.1 3 Synodic Behrend LCDB Lightcurve
139.1 3 Synodic Pilcher 2013MPBu...40..126P Lightcurve
143.092 2 Synodic Pal 2020ApJS..247...26P Lightcurve
16.0 2- Synodic Behrend LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
K K 0.3351 0.3350 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT