1999 SG20
1999SG20, 1973 AD4, 1973AD4, 2000 WY55, 2000WY55, 40738, J73A04D, J99S20G, K00W55Y
All data for this body: [vot]
MPC data
| Name (number) |
1999 SG20 (40738) |
| a |
3.16423 |
| e |
0.19201 |
| i / sin(i) |
13.1621 /
0.22771
|
| q |
2.55667
|
| Q |
3.77178
|
| ω |
307.5211 |
| Node |
101.1225 |
| m |
181.3284 |
| n |
0.1751 |
| Epoch |
2460800.5 |
| nobs |
2365 |
| nopp |
23 |
| Years observed |
1997-2025 |
| rms |
0.72 |
Best values
|
Value |
Standard error |
| Parent |
|
|
| |
|
|
| ap |
3.159 |
|
| ep |
0.174 |
|
| sin(ip) |
0.208 |
|
| G |
0.150 |
|
| H |
13.210 |
|
| Mass |
|
|
| D |
8.94 |
0.197 |
| pV |
0.106 |
0.0170 |
|
Value |
| Rotational Period |
|
| Period quality |
None |
| Spectral Class |
X |
| Spectral Class Score |
5.670 |
Proper elements data
| ap |
ep |
sin(ip) |
Author |
Reference |
Method |
| 3.1587 |
0.1736 |
0.2080 |
Novakovic_Radovic_Todovic |
2003A&A...403.1165K |
Numeric-Nov-2024 |
Diameter data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 8.94 |
0.197 |
0.197 |
Masiero |
2011ApJ...741...68M |
NEATM |
Albedo data
| Value |
Uncertainty up |
Uncertainty down |
Author |
Reference |
Method |
| 0.106 |
0.0170 |
0.0170 |
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 |
| 13.21 |
|
|
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 |
| X |
|
0.945 |
|
Bus-Demeo |
VIS |
Sergeyev |
2022A&A...658A.109S |
PHOT |