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Note number : 0040 P/Du Toit-Neujmin-Delporte : 57P

Introduction

The following improved orbital elements, are from 619 observations 1995 May 23 to 2009 November 24, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.53 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2008 December 25 at 0h TT, julian day 2454825.5.

Perihelion passage (T) 2008 December 25.95497 TT ±0.00001 TT
Argument of perihelion (ω) 115.3026296° ±0.0013844°
>Longitude of the node (Ω) 188.8240881° ۪.0012543°
Inclinaison (i) 2.8480918° ±0.0000709°
Perihelion distance (q) 1.7237921 ua ±0.0000041 ua
Eccentricity (e) 0.5002613 ±0.0000069
Semimajor axis (a) 3.4493870 ua ±0.0000560 ua
Mean motion (n) 0.15384776°/jour ±0.00000375°/jour
Period (P) 6.407 years ±0.0001561 (0.0570 day)

Non-gravitational parameters :

A1 = 1.48489 .10-8 ±0.01724 .10-8
A2 = 0.00501 .10-8 ±0.00081 .10-8
A3 = -0.13624 .10-8 ±0.00633 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) avec H1 = 13.84± 0.05 calculé à l'aide de 234 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) avec H2 = 14.52±0.02 calculé à l'aide de 67 observation(s).

Elements for the next transit through perihelion

Epoch :2015 May 22 at 0h TT, julian day 2457164.5 TT.

T =2015 May 22.26572 TT.
q :1.7288380 ua (J2000) P Q
n : 0.15362830°/jour ω : 115.2180479° +0.55931540 +0.82892006
a : 3.4526712 ua Ω : 188.8022385° -0.77731325 +0.52126263
e : 0.4992752 i : 2.8480886° -0.28801111 +0.20292066
P =6.42 years

Elements for the previous transit(s) through perihelion

Epoch :2002 July 31 at 0h TT, julian day 2452486.5 TT.

T =2002 July 31.17970 TT.
q :1.7294643 ua (J2000) P Q
n : 0.15362092°/jour ω : 115.2464072° +0.56151972 +0.82742752
a : 3.4527818 ua Ω : 188.9265298° -0.77592012 +0.52328628
e : 0.4991099 i : 2.8446312° -0.28747795 +0.20380178
P =6.42 years

Epoch :1996 March 5 at 0h TT, julian day 2450147.5 TT.

T =1996 March 5.73109 TT.
q :1.7196453 ua (J2000) P Q
n : 0.15415938°/jour ω : 115.2163253° +0.56198303 +0.82711239
a : 3.4447371 ua Ω : 188.9887992° -0.77564121 +0.52370686
e : 0.5007906 i : 2.8457764° -0.28732524 +0.20400055
P =6.39 years

Epoch :1989 October 18 at 0h TT, julian day 2447817.5 TT.

T =1989 October 18.50925 TT.
q :1.7153393 ua (J2000) P Q
n : 0.15433304°/jour ω : 115.3156661° +0.56438998 +0.82547128
a : 3.4421525 ua Ω : 189.0564617° -0.77412518 +0.52594760
e : 0.5016667 i : 2.8465208° -0.28669522 +0.20488113
P =6.39 years

Contact

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

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