1981 EK21
1981EK21, 1999 CT34, 1999CT34, 52249, J81E21K, J99C34T
All data for this body: [vot]
MPC data
| Name (number) |
1981 EK21 (52249) |
| a |
2.75641 |
| e |
0.08241 |
| i / sin(i) |
7.4687 /
0.12998
|
| q |
2.52926
|
| Q |
2.98356
|
| ω |
260.9524 |
| Node |
346.3167 |
| m |
170.7306 |
| n |
0.2154 |
| Epoch |
2460800.5 |
| nobs |
1218 |
| nopp |
20 |
| Years observed |
1981-2025 |
| rms |
0.82 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
2.756 |
|
| ep |
0.106 |
|
| sin(ip) |
0.140 |
|
| G |
0.150 |
|
| H |
15.160 |
|
| Mass |
|
|
| D |
6.04 |
0.126 |
| pV |
0.044 |
0.0088 |
|
Value |
| Rotational Period |
|
| Period quality |
None |
| Spectral Class |
None |
| Spectral Class Score |
|
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 2.7560 |
0.1065 |
0.1396 |
Novakovic_Radovic_Todovic |
2003A&A...403.1165K |
Numeric-Nov-2024 |
Diameter data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 6.04 |
0.126 |
0.126 |
Masiero |
2011ApJ...741...68M |
NEATM |
Albedo data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 0.044 |
0.0088 |
0.0088 |
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 |
| 15.16 |
|
|
MPC-2023-12-04 |
MPC-2023-12-04 |
Phot |