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Note number : 0150 P/McNaught-Hughes : 130P

• 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 763 observations 1991 September 14 to 2012 January 15, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.43 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2011 June 24 at 0h TT, julian day 2455736.5.

Perihelion passage (T)	2011 June 24.78071 TT	±0.00000 TT
Argument of perihelion (ω)	224.3673658°	±0.0000452°
>Longitude of the node (Ω)	89.8138943°	۪.0000477°
Inclinaison (i)	7.3073324°	±0.0000061°
Perihelion distance (q)	2.0980599 ua	±0.0000002 ua
Eccentricity (e)	0.4066904	±0.0000004
Semimajor axis (a)	3.5361976 ua	±0.0000029 ua
Mean motion (n)	0.14821743°/jour	±0.00000018°/jour
Period (P)	6.650 years	±0.0000082 (0.0030 day)

Non-gravitational parameters :

A₁ = -0.14375 .10^-8 ±0.00851 .10^-8
A₂ = 0.00294 .10^-8 ±0.00015 .10^-8

Formulæ for magnitudes

Total magnitude :
m₁ = H₁ + 5log(Δ) + 10 log(r) avec H₁ = 13.65± 0.03 calculé à l'aide de 99 observation(s).
Nuclear magnitude :
m₂ = H₂ + 5log(Δ) + 5 log(r) avec H₂ = 13.96±0.01 calculé à l'aide de 314 observation(s).

Elements for the next transit through perihelion

Epoch :2018 January 21 at 0h TT, julian day 2458139.5 TT.

T =2018 January 21.76095 TT.
q :1.8236327 ua	(J2000)	P	Q
n : 0.15846703°/jour	ω : 245.9089017°	+0.71654528	+0.69041433
a : 3.3820246 ua	Ω : 70.2575955°	-0.59546250	+0.67969526
e : 0.4607867	i : 6.0654180°	-0.36330051	+0.24767399
P =6.22 years

Elements for the previous transit(s) through perihelion

Epoch :2004 October 23 at 0h TT, julian day 2453301.5 TT.

T =2004 October 23.28773 TT.
q :2.1042487 ua	(J2000)	P	Q
n : 0.14786669°/jour	ω : 224.1212898°	+0.68909982	+0.71341790
a : 3.5417874 ua	Ω : 89.8862964°	-0.62466566	+0.67375285
e : 0.4058795	i : 7.3070376°	-0.36733398	+0.19259282
P =6.67 years

Epoch :1998 February 23 at 0h TT, julian day 2450867.5 TT.

T =1998 February 23.79046 TT.
q :2.1162922 ua	(J2000)	P	Q
n : 0.14727318°/jour	ω : 224.3697411°	+0.69328202	+0.70936533
a : 3.5512965 ua	Ω : 89.9735281°	-0.62078755	+0.67742949
e : 0.4040790	i : 7.3035110°	-0.36603669	+0.19465383
P =6.69 years

Epoch :1991 June 16 at 0h TT, julian day 2448423.5 TT.

T =1991 June 16.12419 TT.
q :2.1254073 ua	(J2000)	P	Q
n : 0.14697057°/jour	ω : 224.4311593°	+0.69413804	+0.70853756
a : 3.5561696 ua	Ω : 89.9808336°	-0.61999511	+0.67816184
e : 0.4023324	i : 7.3003391°	-0.36575735	+0.19511800
P =6.71 years

Contact

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

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