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Note number : 0081 P/Howell : 88P

Introduction

The following improved orbital elements, are from 1453 observations 2003 January 31 to 2014 June 23, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.46 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2015 April 6 at 0h TT, julian day 2457118.5.

Perihelion passage (T) 2015 April 6.24238 TT ±0.00000 TT
Argument of perihelion (ω) 235.9188668° ±0.0007888°
>Longitude of the node (Ω) 56.6974385° ۪.0007792°
Inclinaison (i) 4.3825124° ±0.0000563°
Perihelion distance (q) 1.3585953 ua ±0.0000018 ua
Eccentricity (e) 0.5630190 ±0.0000045
Semimajor axis (a) 3.1090490 ua ±0.0000359 ua
Mean motion (n) 0.17978884°/jour ±0.00000312°/jour
Period (P) 5.482 years ±0.0000950 (0.0347 day)

Non-gravitational parameters :

A1 = 0.78232 .10-8 ±0.00385 .10-8
A2 = -0.01637 .10-8 ±0.00018 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 12.17± 0.04 calculated using 308 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 13.90±0.03 calculated using 581 observation(s).

Elements for the next transit through perihelion

Epoch :2020 September 26 at 0h TT, julian day 2459118.5 TT.

T =2020 September 26.58542 TT.
q :1.3531140 ua (J2000) P Q
n : 0.18006182°/jour ω : 235.9129780° +0.38219366 +0.92187246
a : 3.1059059 ua Ω : 56.6822249° -0.82065859 +0.37037840
e : 0.5643416 i : 4.3834348° -0.42479111 +0.11389033
P =5.47 years

Elements for the previous transit(s) through perihelion

Epoch :2009 October 12 at 0h TT, julian day 2455116.5 TT.

T =2009 October 12.46479 TT.
q :1.3634881 ua (J2000) P Q
n : 0.17945401°/jour ω : 235.9601852° +0.38415839 +0.92105322
a : 3.1129150 ua Ω : 56.7570906° -0.81990307 +0.37215234
e : 0.5619899 i : 4.3818872° -0.42447767 +0.11473272
P =5.49 years

Epoch :2004 April 12 at 0h TT, julian day 2453107.5 TT.

T =2004 April 12.56107 TT.
q :1.3675167 ua (J2000) P Q
n : 0.17918691°/jour ω : 235.8466311° +0.38334025 +0.92139016
a : 3.1160078 ua Ω : 56.8197967° -0.82025029 +0.37145498
e : 0.5611318 i : 4.3825749° -0.42454648 +0.11428639
P =5.50 years

Contact

Send your suggestion to the author of the notes : Patrick Rocher

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