2009 ST221
2009ST221, ~00Q4, 2015 XK270, 2015XK270, K09SM1T, K15XR0K
All data for this body: [vot]
MPC data
| Name (number) |
2009 ST221 (621616) |
| a |
3.02706 |
| e |
0.17004 |
| i / sin(i) |
5.0497 /
0.08802
|
| q |
2.51235
|
| Q |
3.54178
|
| ω |
230.6772 |
| Node |
86.0130 |
| m |
16.3825 |
| n |
0.1871 |
| Epoch |
2460800.5 |
| nobs |
69 |
| nopp |
9 |
| Years observed |
2009-2025 |
| rms |
0.25 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
3.029 |
|
| ep |
0.161 |
|
| sin(ip) |
0.061 |
|
| G |
0.150 |
|
| H |
17.300 |
|
| Mass |
|
|
| D |
|
|
| pV |
|
|
|
Value |
| Rotational Period |
|
| Period quality |
None |
| Spectral Class |
V |
| Spectral Class Score |
0.186 |
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 3.0286 |
0.1609 |
0.0614 |
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 |
| 17.30 |
|
|
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 |
| V |
V |
0.0310 |
0.0310 |
Bus-Demeo |
VIS |
Sergeyev |
2021A&A...652A..59S |
PHOT |