Helena
00101, 1868PA, I68P00AAll data for this body: [vot]
MPC data
Name (number) | Helena (101) |
---|---|
Packed designation | 00101 |
a | 2.58380 |
e | 0.14119 |
i / sin(i) | 10.1978 / 0.17705 |
q | 2.21901 |
Q | 2.94860 |
ω | 348.3123 |
Node | 343.3832 |
m | 350.7352 |
n | 0.2373 |
Epoch | 2459600.5 |
nobs | 2634 |
---|---|
nopp | 59 |
Years observed | 1871-2021 |
rms | 0.56 |
Proper elements data
ap | ep | sin(ip) | Author | Reference | Method |
---|---|---|---|---|---|
2.5833 | 0.1101 | 0.1800 | Novakovic_Radovic_Todovic | 2003A&A...403.1165K | Numeric-Jan-2022 |
Diameter data
Value | Uncertainty up | Uncertainty down | Author | Reference | Method |
---|---|---|---|---|---|
57.22 | 1.542 | 1.542 | Ryan&Woodward | 2010AJ....140..933R | IRAS-STM |
60.38 | 0.730 | 0.730 | Usui | 2011PASJ...63.1117U | NEATM |
61.22 | 6.120 | 6.120 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
65.84 | 1.300 | 1.300 | Tedesco | 2002AJ....123.1056T | STM |
66.89 | 6.690 | 6.690 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
67.22 | 2.950 | 2.950 | Masiero | 2012ApJ...759L...8M | NEATM |
72.39 | 3.267 | 3.267 | Ryan&Woodward | 2010AJ....140..933R | IRAS-NEATM |
Albedo data
Value | Uncertainty up | Uncertainty down | Author | Reference | Method |
---|---|---|---|---|---|
0.157 | 0.0146 | 0.0146 | Ryan&Woodward | 2010AJ....140..933R | IRAS-NEATM |
0.182 | 0.0220 | 0.0220 | Masiero | 2012ApJ...759L...8M | NEATM |
0.190 | 0.0080 | 0.0080 | Tedesco | 2002AJ....123.1056T | STM |
0.207 | 0.0410 | 0.0410 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
0.247 | 0.0490 | 0.0490 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
0.252 | 0.0137 | 0.0137 | Ryan&Woodward | 2010AJ....140..933R | IRAS-STM |
G data
Value | Uncertainty up | Uncertainty down | Author | Reference | Method |
---|---|---|---|---|---|
0.15 | MPC-2022-01-18 | MPC-2022-01-18 | Phot |
H data
Value | Uncertainty up | Uncertainty down | Author | Reference | Method |
---|---|---|---|---|---|
8.23 | MPC-2022-01-18 | MPC-2022-01-18 | Phot |