2001 HB21
2001HB21, 1997 HF18, 1997HF18, H8839, J97H18F, K01H21B
All data for this body: [vot]
MPC data
| Name (number) |
2001 HB21 (178839) |
| a |
2.54685 |
| e |
0.10366 |
| i / sin(i) |
12.2448 /
0.21209
|
| q |
2.28285
|
| Q |
2.81085
|
| ω |
202.2121 |
| Node |
35.5877 |
| m |
305.6252 |
| n |
0.2425 |
| Epoch |
2460800.5 |
| nobs |
624 |
| nopp |
19 |
| Years observed |
1997-2025 |
| rms |
0.91 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
2.549 |
|
| ep |
0.131 |
|
| sin(ip) |
0.201 |
|
| G |
0.150 |
|
| H |
16.290 |
|
| Mass |
|
|
| D |
|
|
| pV |
|
|
|
Value |
| Rotational Period |
|
| Period quality |
None |
| Spectral Class |
None |
| Spectral Class Score |
|
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 2.5492 |
0.1309 |
0.2013 |
Novakovic_Radovic_Todovic |
2003A&A...403.1165K |
Numeric-Nov-2024 |
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 |
| 16.29 |
|
|
MPC-2023-12-04 |
MPC-2023-12-04 |
Phot |