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

Introduction

The following improved orbital elements, are from 21639 observations 1902 March 4 to 2015 May 24. Perturbations by all nine planets were taken into account, and relativity effect of the sun.

The mean residual is 0.38 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 10.77496 TT ±0.00000 TT
Argument of perihelion (ω) 48.9526680° ±0.0000066°
>Longitude of the node (Ω) 312.7152014° ۪.0000070°
Inclinaison (i) 9.3920895° ±0.0000012°
Perihelion distance (q) 5.7235802 ua ±0.0000000 ua
Eccentricity (e) 0.0441697 ±0.0000000
Semimajor axis (a) 5.9880718 ua ±0.0000002 ua
Mean motion (n) 0.06726259°/jour ±0.00000000°/jour
Period (P) 14.653 years ±0.0000008 (0.0003 day)

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 3.14± 0.02 calculated using 2525 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 8.22±0.01 calculated using 11966 observation(s).

Elements for the next transit through perihelion

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

T =2019 March 7.78531 TT.
q :5.7668201 ua (J2000) P Q
n : 0.06662907°/jour ω : 47.7759999° +0.99270119 -0.00960759
a : 6.0259688 ua Ω : 312.3951952° -0.05131832 +0.86841837
e : 0.0430053 i : 9.3684276° +0.10913653 +0.49573908
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 26.49995 TT.
q :5.7717709 ua (J2000) P Q
n : 0.06636749°/jour ω : 49.8546631° +0.99140740 -0.05344671
a : 6.0417925 ua Ω : 312.8470875° -0.01263466 +0.86932960
e : 0.0446923 i : 9.3720878° +0.13019879 +0.49133441
P =14.85 years

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

T =1974 February 17.44044 TT.
q :5.4478432 ua (J2000) P Q
n : 0.06569455°/jour ω : 14.6240270° +0.90379247 +0.41410940
a : 6.0829813 ua Ω : 320.3503258° -0.40769629 +0.75630986
e : 0.1044123 i : 9.7481032° -0.13016491 +0.50646698
P =15.00 years

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

T =1957 May 12.82539 TT.
q :5.5376801 ua (J2000) P Q
n : 0.06121499°/jour ω : 355.8028813° +0.74528044 +0.65908922
a : 6.3762334 ua Ω : 322.3277077° -0.60683075 +0.60787738
e : 0.1315123 i : 9.4925167° -0.27624899 +0.44281654
P =16.10 years

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

T =1941 April 21.59412 TT.
q :5.5228633 ua (J2000) P Q
n : 0.06106553°/jour ω : 356.2263873° +0.75465893 +0.64841931
a : 6.3866329 ua Ω : 322.7212378° -0.59756158 +0.61617365
e : 0.1352465 i : 9.5233035° -0.27094290 +0.44708212
P =16.14 years

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

T =1925 May 7.82495 TT.
q :5.4749770 ua (J2000) P Q
n : 0.05995274°/jour ω : 359.0856438° +0.79727082 +0.59578777
a : 6.4654190 ua Ω : 323.7725045° -0.55276580 +0.65610810
e : 0.1531907 i : 9.4402261° -0.24250609 +0.46320524
P =16.44 years

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

T =1908 October 18.74975 TT.
q :5.4953685 ua (J2000) P Q
n : 0.05996857°/jour ω : 357.0798793° +0.78216143 +0.61572396
a : 6.4642814 ua Ω : 324.3421950° -0.56829224 +0.64217187
e : 0.1498872 i : 9.4222688° -0.25547489 +0.45661724
P =16.44 years

Contact

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

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