IAU Minor Planet Center

(101) Helena

Orbital Elements

  (101) Helena
Epoch 2005 Jan. 30.0 TT = JDT 2453400.5                 Goffin
M 319.35611              (2000.0)            P               Q
n   0.23749070     Peri.  347.86463     +0.87849006     +0.47510052
a   2.5824880      Node   343.48305     -0.42219569     +0.72267320
e   0.1412175      Incl.   10.20017     -0.22362023     +0.50201886
P   4.15           H    8.33          G   0.35           U   0
From 589 observations at 55 oppositions, 1868-2003, mean residual 0".56.

These orbital elements are also available in forms suitable for loading into a number of popular planetarium-type software programs.

Ephemeris

Personalized ephemerides for this object (and others) can be generated using the MPES.

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
 
2005 07 20    23 43.12   -05 17.9    1.492    2.218   123.2    22.5    11.8
2005 07 25    23 43.57   -04 53.8    1.446    2.218   127.7    21.2    11.7
2005 07 30    23 43.26   -04 32.8    1.403    2.218   132.5    19.7    11.6
2005 08 04    23 42.18   -04 14.9    1.363    2.219   137.4    18.0    11.5
2005 08 09    23 40.32   -04 00.0    1.328    2.219   142.5    16.1    11.3
2005 08 14    23 37.71   -03 48.2    1.296    2.220   147.8    14.1    11.2
2005 08 19    23 34.41   -03 39.1    1.270    2.222   153.4    11.8    11.1
2005 08 24    23 30.49   -03 32.6    1.249    2.223   159.0     9.4    11.0
2005 08 29    23 26.04   -03 28.4    1.234    2.225   164.9     6.8    10.9
2005 09 03    23 21.21   -03 26.0    1.225    2.226   170.8     4.2    10.8
2005 09 08    23 16.15   -03 24.8    1.222    2.228   176.6     1.5    10.7
2005 09 13    23 11.04   -03 24.3    1.225    2.230   176.7     1.5    10.7
2005 09 18    23 06.07   -03 23.7    1.235    2.233   170.9     4.1    10.8
2005 09 23    23 01.39   -03 22.7    1.251    2.235   165.0     6.7    10.9
2005 09 28    22 57.14   -03 20.6    1.273    2.238   159.1     9.2    11.1
2005 10 03    22 53.47   -03 17.0    1.301    2.241   153.4    11.5    11.2
2005 10 08    22 50.47   -03 11.4    1.335    2.244   147.8    13.7    11.3
2005 10 13    22 48.21   -03 03.6    1.373    2.248   142.4    15.7    11.4
2005 10 18    22 46.72   -02 53.3    1.416    2.251   137.2    17.5    11.6
2005 10 23    22 46.01   -02 40.4    1.463    2.255   132.1    19.1    11.7
2005 10 28    22 46.08   -02 24.8    1.514    2.259   127.3    20.5    11.8

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