1991 RA18

1991RA18, 18374, 1998 FJ140, 1998FJ140, J91R18A, J98FE0J

All data for this body: [vot]

MPC data
Name (number) 1991 RA18 (18374)
a 2.68820
e 0.13481
i / sin(i) 3.0578 / 0.05334
q 2.32582
Q 3.05058
ω 154.0987
Node 215.3113
m 213.6110
n 0.2236
Epoch 2460800.5
nobs 2369
nopp 23
Years observed 1991-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.688
ep 0.094
sin(ip) 0.066
G 0.150
H 14.550
Mass
D 7.83 0.040
pV 0.042 0.0074
Value
Rotational Period
Period quality None
Spectral Class None
Spectral Class Score
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6884 0.0943 0.0659 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.41 1.630 1.630 Masiero 2021PSJ.....2..162M NEATM
7.83 0.040 0.040 Masiero 2011ApJ...741...68M NEATM
8.15 2.100 2.100 Masiero 2020PSJ.....1....5M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.041 0.0077 0.0077 Masiero 2011ApJ...741...68M NEATM
0.046 0.0440 0.0440 Masiero 2020PSJ.....1....5M NEATM
0.056 0.0240 0.0410 Masiero 2021PSJ.....2..162M 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
14.55 MPC-2023-12-04 MPC-2023-12-04 Phot