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Note number : 0104 P/Singer-Brewster : 105P

• 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 285 observations 1999 February 13 to 2012 November 6, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.50 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2012 February 26 at 0h TT, julian day 2455983.5.

Perihelion passage (T)	2012 February 26.17237 TT	±0.00000 TT
Argument of perihelion (ω)	46.6736259°	±0.0000930°
>Longitude of the node (Ω)	192.4189989°	۪.0000791°
Inclinaison (i)	9.1704475°	±0.0000127°
Perihelion distance (q)	2.0508764 ua	±0.0000007 ua
Eccentricity (e)	0.4092692	±0.0000010
Semimajor axis (a)	3.4717613 ua	±0.0000071 ua
Mean motion (n)	0.15236292°/jour	±0.00000047°/jour
Period (P)	6.469 years	±0.0000199 (0.0073 day)

Non-gravitational parameters :

A₁ = -0.24254 .10^-8 ±0.04367 .10^-8
A₂ = -0.07026 .10^-8 ±0.00090 .10^-8

Formulæ for magnitudes

Total magnitude :
m₁ = H₁ + 5log(Δ) + 10 log(r) avec H₁ = 13.41± 0.05 calculé à l'aide de 117 observation(s).
Nuclear magnitude :
m₂ = H₂ + 5log(Δ) + 5 log(r) avec H₂ = 15.90±0.07 calculé à l'aide de 99 observation(s).

Elements for the next transit through perihelion

Epoch :2018 August 10 at 0h TT, julian day 2458340.5 TT.

T =2018 August 10.33410 TT.
q :2.0445395 ua	(J2000)	P	Q
n : 0.15258661°/jour	ω : 46.4805998°	-0.51836352	+0.85447129
a : 3.4683674 ua	Ω : 192.4305662°	-0.82338252	-0.50953865
e : 0.4105182	i : 9.1750840°	-0.23095558	-0.10123820
P =6.46 years

Elements for the previous transit(s) through perihelion

Epoch :2005 September 11 at 0h TT, julian day 2453624.5 TT.

T =2005 September 11.32974 TT.
q :2.0413139 ua	(J2000)	P	Q
n : 0.15278937°/jour	ω : 46.6521093°	-0.51519777	+0.85637869
a : 3.4652983 ua	Ω : 192.4715629°	-0.82525579	-0.50652212
e : 0.4109269	i : 9.1792738°	-0.23135286	-0.10025414
P =6.45 years

Epoch :1999 April 6 at 0h TT, julian day 2451274.5 TT.

T =1999 April 6.45539 TT.
q :2.0323950 ua	(J2000)	P	Q
n : 0.15308176°/jour	ω : 46.8060219°	-0.51180138	+0.85840350
a : 3.4608843 ua	Ω : 192.5454743°	-0.82724550	-0.50331191
e : 0.4127527	i : 9.1873434°	-0.23178488	-0.09909870
P =6.44 years

Contact

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

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