1998 UM21
1998UM21, 1990 VT5, 1990VT5, 44447, J90V05T, J98U21M
All data for this body: [vot]
MPC data
| Name (number) |
1998 UM21 (44447) |
| a |
2.57002 |
| e |
0.19190 |
| i / sin(i) |
13.6380 /
0.23579
|
| q |
2.07684
|
| Q |
3.06320
|
| ω |
169.4162 |
| Node |
213.8823 |
| m |
13.0282 |
| n |
0.2392 |
| Epoch |
2460200.5 |
| nobs |
1195 |
| nopp |
21 |
| Years observed |
1990-2023 |
| rms |
0.68 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
2.570 |
|
| ep |
0.166 |
|
| sin(ip) |
0.237 |
|
|
Value |
Standard error |
| G |
0.150 |
|
| H |
14.840 |
|
| Mass |
|
|
| D |
3.74 |
0.157 |
| pV |
0.167 |
0.0312 |
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 2.5701 |
0.1658 |
0.2375 |
Novakovic_Radovic_Todovic |
2003A&A...403.1165K |
Numeric-Oct-2022 |
Diameter data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 3.74 |
0.157 |
0.157 |
Masiero |
2011ApJ...741...68M |
NEATM |
Albedo data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 0.167 |
0.0312 |
0.0312 |
Masiero |
2011ApJ...741...68M |
NEATM |
G data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 0.15 |
|
|
MPC-2023-12-94 |
MPC-2023-12-94 |
Phot |
H data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 14.84 |
|
|
MPC-2023-12-04 |
MPC-2023-12-04 |
Phot |