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Note number : 0015 P/Schwassmann-Wachmann 1 : 29P

• 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 19803 observations 1902 March 4 to 2013 May 5. Perturbations by all nine planets were taken into account, and relativity effect of the sun.

The mean residual is 0.39 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2004 July 18 at 0h TT, julian day 2453204.5.

Perihelion passage (T)	2004 July 10.77390 TT	±0.00000 TT
Argument of perihelion (ω)	48.9525708°	±0.0000072°
>Longitude of the node (Ω)	312.7152363°	۪.0000076°
Inclinaison (i)	9.3920956°	±0.0000013°
Perihelion distance (q)	5.7235812 ua	±0.0000000 ua
Eccentricity (e)	0.0441695	±0.0000000
Semimajor axis (a)	5.9880714 ua	±0.0000003 ua
Mean motion (n)	0.06726260°/jour	±0.00000000°/jour
Period (P)	14.653 years	±0.0000009 (0.0003 day)

Formulæ for magnitudes

Total magnitude :
m₁ = H₁ + 5log(Δ) + 10 log(r) avec H₁ = 3.15± 0.02 calculé à l'aide de 2402 observation(s).
Nuclear magnitude :
m₂ = H₂ + 5log(Δ) + 5 log(r) avec H₂ = 8.20±0.01 calculé à l'aide de 10639 observation(s).

Elements for the next transit through perihelion

Epoch :2019 March 7 at 0h TT, julian day 2458549.5 TT.

T =2019 March 7.78348 TT.
q :5.7668210 ua	(J2000)	P	Q
n : 0.06662908°/jour	ω : 47.7758931°	+0.99270120	-0.00960636
a : 6.0259683 ua	Ω : 312.3952303°	-0.05131942	+0.86841823
e : 0.0430051	i : 9.3684337°	+0.10913591	+0.49573934
P =14.79 years

Elements for the previous transit(s) through perihelion

Epoch :1989 October 26 at 0h TT, julian day 2447825.5 TT.

T =1989 October 26.49956 TT.
q :5.7717719 ua	(J2000)	P	Q
n : 0.06636749°/jour	ω : 49.8545717°	+0.99140745	-0.05344574
a : 6.0417921 ua	Ω : 312.8471223°	-0.01263553	+0.86932951
e : 0.0446921	i : 9.3720940°	+0.13019832	+0.49133466
P =14.85 years

Epoch :1974 February 17 at 0h TT, julian day 2442095.5 TT.

T =1974 February 17.43813 TT.
q :5.4478452 ua	(J2000)	P	Q
n : 0.06569457°/jour	ω : 14.6238158°	+0.90379095	+0.41411268
a : 6.0829800 ua	Ω : 320.3503275°	-0.40769908	+0.75630828
e : 0.1044118	i : 9.7481135°	-0.13016673	+0.50646665
P =15.00 years

Epoch :1957 May 12 at 0h TT, julian day 2435970.5 TT.

T =1957 May 12.82376 TT.
q :5.5376820 ua	(J2000)	P	Q
n : 0.06121500°/jour	ω : 355.8026175°	+0.74527748	+0.65909256
a : 6.3762324 ua	Ω : 322.3277138°	-0.60683347	+0.60787456
e : 0.1315119	i : 9.4925267°	-0.27625101	+0.44281545
P =16.10 years

Epoch :1941 April 21 at 0h TT, julian day 2430105.5 TT.

T =1941 April 21.59445 TT.
q :5.5228652 ua	(J2000)	P	Q
n : 0.06106555°/jour	ω : 356.2261539°	+0.75465634	+0.64842232
a : 6.3866318 ua	Ω : 322.7212420°	-0.59756403	+0.61617118
e : 0.1352460	i : 9.5233131°	-0.27094471	+0.44708118
P =16.14 years

Epoch :1925 May 7 at 0h TT, julian day 2424277.5 TT.

T =1925 May 7.82609 TT.
q :5.4749784 ua	(J2000)	P	Q
n : 0.05995274°/jour	ω : 359.0853681°	+0.79726822	+0.59579125
a : 6.4654191 ua	Ω : 323.7725293°	-0.55276864	+0.65610558
e : 0.1531905	i : 9.4402360°	-0.24250819	+0.46320432
P =16.44 years

Epoch :1908 October 18 at 0h TT, julian day 2418232.5 TT.

T =1908 October 18.74860 TT.
q :5.4953708 ua	(J2000)	P	Q
n : 0.05996856°/jour	ω : 357.0795320°	+0.78215807	+0.61572823
a : 6.4642823 ua	Ω : 324.3422287°	-0.56829571	+0.64216868
e : 0.1498869	i : 9.4222777°	-0.25547748	+0.45661596
P =16.44 years

Contact

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

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