2008 HD21
2008HD21, 1998 QR27, 1998QR27, J98Q27R, K08H21D, P7152
All data for this body: [vot]
MPC data
| Name (number) |
2008 HD21 (257152) |
| a |
3.06048 |
| e |
0.09273 |
| i / sin(i) |
6.1437 /
0.10702
|
| q |
2.77668
|
| Q |
3.34429
|
| ω |
91.3531 |
| Node |
138.3184 |
| m |
70.0078 |
| n |
0.1841 |
| Epoch |
2460800.5 |
| nobs |
286 |
| nopp |
17 |
| Years observed |
1996-2025 |
| rms |
0.89 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
3.062 |
|
| ep |
0.117 |
|
| sin(ip) |
0.094 |
|
| G |
0.150 |
|
| H |
16.370 |
|
| Mass |
|
|
| D |
|
|
| pV |
|
|
|
Value |
| Rotational Period |
|
| Period quality |
None |
| Spectral Class |
C |
| Spectral Class Score |
5.934 |
Family data
| Parent |
Parent name |
Family ID |
Family name |
Cj |
Author |
Reference |
Method |
| 10 |
Hygiea |
0 |
Hygiea |
|
Novakovic |
2019EPSC...13.1671N |
HCM |
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 3.0624 |
0.1167 |
0.0937 |
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 |
| 16.37 |
|
|
MPC-2023-12-04 |
MPC-2023-12-04 |
Phot |
Spectral Class Data
| Class 1 |
Class 2 |
Probability of Class 1 |
Probability of Class 2 |
Taxonomy |
Wavelength |
Author |
Reference |
Method |
| C |
|
0.989 |
|
Bus-Demeo |
VIS |
Sergeyev |
2022A&A...658A.109S |
PHOT |