Yiliuchen
18887, 1981 UB22, 1981UB22, 1981 UY19, 1981UY19, 2000 AP181, 2000AP181, J81U19Y, J81U22B, K00AI1P
All data for this body: [vot]
MPC data
| Name (number) |
Yiliuchen (18887) |
| a |
2.30308 |
| e |
0.16909 |
| i / sin(i) |
6.7180 /
0.11698
|
| q |
1.91365
|
| Q |
2.69251
|
| ω |
163.4049 |
| Node |
179.7769 |
| m |
202.2660 |
| n |
0.2820 |
| Epoch |
2460800.5 |
| nobs |
3326 |
| nopp |
22 |
| Years observed |
1981-2025 |
| rms |
0.68 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
2.304 |
|
| ep |
0.122 |
|
| sin(ip) |
0.119 |
|
| G |
0.150 |
|
| H |
14.320 |
|
| Mass |
|
|
| D |
3.55 |
0.126 |
| pV |
0.223 |
0.0414 |
|
Value |
| Rotational Period |
|
| Period quality |
None |
| Spectral Class |
S |
| Spectral Class Score |
4.472 |
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 2.3038 |
0.1221 |
0.1190 |
Novakovic_Radovic_Todovic |
2003A&A...403.1165K |
Numeric-Nov-2024 |
Diameter data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 3.55 |
0.126 |
0.126 |
Masiero |
2011ApJ...741...68M |
NEATM |
Albedo data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 0.223 |
0.0414 |
0.0414 |
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 |
| 14.32 |
|
|
MPC-2023-12-04 |
MPC-2023-12-04 |
Phot |