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Note number : 0081 P/Howell : 88P

Introduction

The following improved orbital elements, are from 1034 observations 2008 December 30 to 2015 May 29, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.45 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 6.23631 TT ±0.00000 TT
Argument of perihelion (ω) 235.9205394° ±0.0001950°
>Longitude of the node (Ω) 56.6973846° ۪.0001937°
Inclinaison (i) 4.3825893° ±0.0000139°
Perihelion distance (q) 1.3585724 ua ±0.0000003 ua
Eccentricity (e) 0.5630063 ±0.0000008
Semimajor axis (a) 3.1089064 ua ±0.0000068 ua
Mean motion (n) 0.17980121°/jour ±0.00000059°/jour
Period (P) 5.482 years ±0.0000179 (0.0065 day)

Non-gravitational parameters :

A1 = 0.53409 .10-8 ±0.01019 .10-8
A2 = -0.34253 .10-8 ±0.00595 .10-8
A3 = 0.00720 .10-8 ±0.00347 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 12.26± 0.04 calculated using 162 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 13.96±0.04 calculated using 472 observation(s).

Elements for the next transit through perihelion

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

T =2020 September 26.25022 TT.
q :1.3530738 ua (J2000) P Q
n : 0.18010297°/jour ω : 235.9160593° +0.38223988 +0.92185324
a : 3.1054328 ua Ω : 56.6820199° -0.82063950 +0.37041979
e : 0.5642882 i : 4.3835022° -0.42478640 +0.11391127
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 12.46538 TT.
q :1.3634848 ua (J2000) P Q
n : 0.17943752°/jour ω : 235.9603403° +0.38416255 +0.92105140
a : 3.1131058 ua Ω : 56.7571990° -0.81990085 +0.37215652
e : 0.5620178 i : 4.3819725° -0.42447818 +0.11473382
P =5.49 years

Contact

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

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