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Note number : 0023 P/Klemola : 68P

• Introduction
• Elements
• Formulæ for magnitudes
• Elements for the next transit through perihelion
• Elements for the previous transit(s) through perihelion

• Comparison with observations
• Ephemerides of the comet  (ou click to open TEXT file TEXTE)
• Load the Postscript file of the note

Introduction

The following improved orbital elements, are from 607 observations 1965 November 1 to 2010 January 15, 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 : 2009 January 20 at 0h TT, julian day 2454851.5.

Perihelion passage (T)	2009 January 20.96811 TT	±0.00000 TT
Argument of perihelion (ω)	153.9777006°	±0.0000685°
>Longitude of the node (Ω)	175.3298387°	۪.0000522°
Inclinaison (i)	11.1443540°	±0.0000080°
Perihelion distance (q)	1.7590314 ua	±0.0000005 ua
Eccentricity (e)	0.6406052	±0.0000010
Semimajor axis (a)	4.8944265 ua	±0.0000151 ua
Mean motion (n)	0.09102305°/jour	±0.00000042°/jour
Period (P)	10.828 years	±0.0000502 (0.0184 day)

Non-gravitational parameters :

A₁ = 0.03952 .10^-8 ±0.00278 .10^-8
A₂ = -0.00259 .10^-8 ±0.00002 .10^-8

Formulæ for magnitudes

Total magnitude :
m₁ = H₁ + 5log(Δ) + 10 log(r) avec H₁ = 12.51± 0.05 calculé à l'aide de 113 observation(s).
Nuclear magnitude :
m₂ = H₂ + 5log(Δ) + 5 log(r) avec H₂ = 13.92±0.03 calculé à l'aide de 176 observation(s).

Elements for the next transit through perihelion

Epoch :2019 November 9 at 0h TT, julian day 2458796.5 TT.

T =2019 November 9.03685 TT.
q :1.7938499 ua	(J2000)	P	Q
n : 0.08952334°/jour	ω : 153.0577258°	+0.85007289	+0.52640596
a : 4.9489362 ua	Ω : 175.0827650°	-0.51125064	+0.83231954
e : 0.6375282	i : 11.1108715°	-0.12648661	+0.17361148
P =11.01 years

Elements for the previous transit(s) through perihelion

Epoch :1998 May 1 at 0h TT, julian day 2450934.5 TT.

T =1998 May 1.66058 TT.
q :1.7545203 ua	(J2000)	P	Q
n : 0.09109427°/jour	ω : 154.5413573°	+0.86738749	+0.49740888
a : 4.8918750 ua	Ω : 175.5433741°	-0.48311093	+0.84889706
e : 0.6413399	i : 11.0888549°	-0.11934310	+0.17876854
P =10.82 years

Epoch :1987 July 22 at 0h TT, julian day 2446998.5 TT.

T =1987 July 22.63279 TT.
q :1.7727754 ua	(J2000)	P	Q
n : 0.09002568°/jour	ω : 154.5422845°	+0.87532571	+0.48339346
a : 4.9305091 ua	Ω : 176.4844503°	-0.46974126	+0.85582319
e : 0.6404478	i : 10.9499031°	-0.11466495	+0.18411255
P =10.95 years

Epoch :1976 August 10 at 0h TT, julian day 2443000.5 TT.

T =1976 August 10.19168 TT.
q :1.7655979 ua	(J2000)	P	Q
n : 0.09009756°/jour	ω : 148.8763727°	+0.87554054	+0.48308915
a : 4.9278866 ua	Ω : 182.2744450°	-0.47249330	+0.85297486
e : 0.6417130	i : 10.6338431°	-0.10089026	+0.19763289
P =10.94 years

Epoch :1965 August 18 at 0h TT, julian day 2438990.5 TT.

T =1965 August 18.36040 TT.
q :1.7634174 ua	(J2000)	P	Q
n : 0.09007363°/jour	ω : 148.0358889°	+0.87191984	+0.48957216
a : 4.9287592 ua	Ω : 182.6963922°	-0.47900669	+0.84917164
e : 0.6422188	i : 10.6004531°	-0.10153024	+0.19805713
P =10.94 years

Contact

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

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