1999 XG31

1999XG31, 25466, J99X31G

All data for this body: [vot]

MPC data
Name (number) 1999 XG31 (25466)
a 2.55173
e 0.14706
i / sin(i) 25.0906 / 0.42405
q 2.17647
Q 2.92700
ω 333.8263
Node 101.4863
m 99.3015
n 0.2418
Epoch 2460800.5
nobs 2854
nopp 22
Years observed 1982-2025
rms 0.74
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.551
ep 0.138
sin(ip) 0.401
G 0.150
H 14.140
Mass
D 7.45 0.249
pV 0.040 0.0085
Value
Rotational Period 20.104
Period quality 2
Spectral Class None
Spectral Class Score
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5507 0.1383 0.4013 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.27 3.620 3.620 Masiero 2020PSJ.....1....5M NEATM
7.36 0.258 0.258 Masiero 2011ApJ...741...68M NEATM
7.87 1.801 1.801 Masiero 2017AJ....154..168M NEATM
8.35 2.500 2.500 Masiero 2021PSJ.....2..162M NEATM
8.82 2.210 2.210 Nugent 2016AJ....152...63N NEATM
9.10 2.280 2.280 Masiero 2021PSJ.....2..162M NEATM
9.63 3.000 3.000 Masiero 2020PSJ.....1....5M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.028 0.0114 0.0114 Masiero 2017AJ....154..168M NEATM
0.038 0.0490 0.0490 Masiero 2020PSJ.....1....5M NEATM
0.040 0.0300 0.0300 Nugent 2016AJ....152...63N NEATM
0.044 0.0320 0.0320 Masiero 2020PSJ.....1....5M NEATM
0.049 0.0220 0.0410 Masiero 2021PSJ.....2..162M NEATM
0.051 0.0210 0.0350 Masiero 2021PSJ.....2..162M NEATM
0.090 0.0273 0.0273 Masiero 2011ApJ...741...68M 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
14.14 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
20.1048 2 Sidereal Durech 2023A&A...675A..24D Model