Hel
00949, 1921 EM, 1921EM, 1952 DN, 1952DN, 1954 SN1, 1954SN1, J21E00M, J52D00N, J54S01NAll data for this body: [vot]
MPC data
Name (number) | Hel (949) |
---|---|
a | 2.99879 |
e | 0.19916 |
i / sin(i) | 10.6335 / 0.18453 |
q | 2.40154 |
Q | 3.59604 |
ω | 251.1051 |
Node | 320.6744 |
m | 223.7255 |
n | 0.1898 |
Epoch | 2460200.5 |
nobs | 4233 |
---|---|
nopp | 47 |
Years observed | 1921-2023 |
rms | 0.56 |
Proper elements data
ap | ep | sin(ip) | Author | Reference | Method |
---|---|---|---|---|---|
2.9973 | 0.2243 | 0.2126 | Novakovic_Radovic_Todovic | 2003A&A...403.1165K | Numeric-Oct-2022 |
Diameter data
Value | Uncertainty up | Uncertainty down | Author | Reference | Method |
---|---|---|---|---|---|
52.16 | 14.000 | 14.000 | Nugent | 2016AJ....152...63N | NEATM |
52.87 | 17.360 | 17.360 | Masiero | 2021PSJ.....2..162M | NEATM |
56.29 | 17.640 | 17.640 | Nugent | 2016AJ....152...63N | NEATM |
58.31 | 1.705 | 1.705 | Ryan&Woodward | 2010AJ....140..933R | IRAS-STM |
59.68 | 5.970 | 5.970 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
60.98 | 0.740 | 0.740 | Usui | 2011PASJ...63.1117U | NEATM |
63.49 | 0.740 | 0.740 | Masiero | 2014ApJ...791..121M | NEATM |
64.45 | 6.450 | 6.450 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
66.74 | 1.227 | 1.227 | Masiero | 2011ApJ...741...68M | NEATM |
67.56 | 6.760 | 6.760 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
69.17 | 1.400 | 1.400 | Tedesco | 2002AJ....123.1056T | STM |
75.07 | 4.208 | 4.208 | Ryan&Woodward | 2010AJ....140..933R | IRAS-NEATM |
Albedo data
Value | Uncertainty up | Uncertainty down | Author | Reference | Method |
---|---|---|---|---|---|
0.042 | 0.0050 | 0.0050 | Ryan&Woodward | 2010AJ....140..933R | IRAS-NEATM |
0.049 | 0.0020 | 0.0020 | Tedesco | 2002AJ....123.1056T | STM |
0.050 | 0.0300 | 0.0300 | Nugent | 2016AJ....152...63N | NEATM |
0.051 | 0.0100 | 0.0100 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
0.052 | 0.0057 | 0.0057 | Masiero | 2011ApJ...741...68M | NEATM |
0.055 | 0.0260 | 0.0510 | Masiero | 2021PSJ.....2..162M | NEATM |
0.057 | 0.0110 | 0.0110 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
0.060 | 0.0100 | 0.0100 | Masiero | 2014ApJ...791..121M | NEATM |
0.060 | 0.0300 | 0.0300 | Nugent | 2016AJ....152...63N | NEATM |
0.066 | 0.0130 | 0.0130 | Ali-Lagoa | 2018A&A...612A..85A | NEATM |
0.069 | 0.0041 | 0.0041 | Ryan&Woodward | 2010AJ....140..933R | IRAS-STM |
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 |
---|---|---|---|---|---|
9.84 | MPC-2023-12-04 | MPC-2023-12-04 | Phot |