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Note number : 0152 P/Schwassmann-Wachmann 3 (A) : 73P-A

• 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 62 observations 1995 December 23 to 1996 February 19. Perturbations by all nine planets were taken into account, but not the relativity effect of the Sun.

The mean residual is 0.81 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2001 September 22 at 0h TT, julian day 2452174.5.

Perihelion passage (T)	2001 February 11.96125 TT	±32.23671 TT
Argument of perihelion (ω)	198.9046500°	±1.8849592°
>Longitude of the node (Ω)	69.9126664°	۬.1198622°
Inclinaison (i)	11.4048837°	±1.1379771°
Perihelion distance (q)	0.9388306 ua	±0.0592440 ua
Eccentricity (e)	0.6949349	±0.0431731
Semimajor axis (a)	3.0774760 ua	±0.6297281 ua
Mean motion (n)	0.18256270°/jour	±0.05603530°/jour
Period (P)	5.399 years	±1.6571043 (605.2573 days)

Formulæ for magnitudes

Total magnitude :
m₁ = H₁ + 5log(Δ) + 10 log(r) avec H₁ = 11.77± 0.05 calculé à l'aide de 6 observation(s).
Nuclear magnitude :
m₂ = H₂ + 5log(Δ) + 5 log(r) avec H₂ = 15.01±0.66 calculé à l'aide de 4 observation(s).

Elements for the next transit through perihelion

Epoch :2006 July 8 at 0h TT, julian day 2453924.5 TT.

T =2006 July 7.42709 TT.
q :0.9401192 ua	(J2000)	P	Q
n : 0.18242344°/jour	ω : 198.9142276°	-0.02674076	+0.98228620
a : 3.0790420 ua	Ω : 69.8970977°	-0.88980525	+0.06116272
e : 0.6946715	i : 11.3908857°	-0.45555631	-0.17712407
P =5.40 years

Elements for the previous transit(s) through perihelion

Epoch :1995 September 22 at 0h TT, julian day 2449982.5 TT.

T =1995 September 22.94319 TT.
q :0.9340561 ua	(J2000)	P	Q
n : 0.18295909°/jour	ω : 198.8907442°	-0.02646412	+0.98218646
a : 3.0730295 ua	Ω : 69.9380551°	-0.88976536	+0.06168318
e : 0.6960471	i : 11.4231533°	-0.45565036	-0.17749630
P =5.39 years

Contact

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

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