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Note number : 0020 P/Ashbrook-Jackson : 47P

Introduction

The following improved orbital elements, are from 1351 observations 1993 May 10 to 2014 April 5, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.65 arc second.

Elements

Orbital elements given with respect to the mean ecliptic and equinox of J2000.
Epoch : 2017 June 10 at 0h TT, julian day 2457914.5.

Perihelion passage (T) 2017 June 10.16623 TT ±0.00000 TT
Argument of perihelion (ω) 357.6676635° ±0.0000783°
>Longitude of the node (Ω) 356.9742799° ۪.0000863°
Inclinaison (i) 13.0303203° ±0.0000053°
Perihelion distance (q) 2.8182270 ua ±0.0000002 ua
Eccentricity (e) 0.3170580 ±0.0000004
Semimajor axis (a) 4.1265976 ua ±0.0000026 ua
Mean motion (n) 0.11757524°/jour ±0.00000011°/jour
Period (P) 8.383 years ±0.0000079 (0.0029 day)

Non-gravitational parameters :

A1 = 0.15394 .10-8 ±0.01981 .10-8
A2 = -0.02280 .10-8 ±0.00087 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 10.34± 0.06 calculated using 325 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 12.42±0.02 calculated using 458 observation(s).

Elements for the next transit through perihelion

Epoch :2025 October 28 at 0h TT, julian day 2460976.5 TT.

T =2025 October 27.99948 TT.
q :2.8074623 ua (J2000) P Q
n : 0.11799967°/jour ω : 357.9182325° +0.99593346 +0.08925132
a : 4.1166964 ua Ω : 356.8805624° -0.07905480 +0.80041079
e : 0.3180303 i : 13.0393397° -0.04320738 +0.59277042
P =8.35 years

Elements for the previous transit(s) through perihelion

Epoch :2009 January 31 at 0h TT, julian day 2454862.5 TT.

T =2009 January 31.96911 TT.
q :2.7990897 ua (J2000) P Q
n : 0.11821626°/jour ω : 357.6856451° +0.99572822 +0.09156406
a : 4.1116666 ua Ω : 356.9825682° -0.08067150 +0.80009755
e : 0.3192323 i : 13.0525298° -0.04491570 +0.59284057
P =8.34 years

Epoch :2001 January 6 at 0h TT, julian day 2451915.5 TT.

T =2001 January 6.49362 TT.
q :2.3053681 ua (J2000) P Q
n : 0.13214436°/jour ω : 348.8841054° +0.98877196 +0.14910824
a : 3.8174230 ua Ω : 2.6019518° -0.11501971 +0.80143910
e : 0.3960931 i : 12.5134007° -0.09539645 +0.57919090
P =7.46 years

Epoch :1993 July 14 at 0h TT, julian day 2449182.5 TT.

T =1993 July 14.05498 TT.
q :2.3162907 ua (J2000) P Q
n : 0.13160154°/jour ω : 348.6902816° +0.98842402 +0.15138246
a : 3.8279131 ua Ω : 2.6653242° -0.11675219 +0.80132433
e : 0.3948946 i : 12.5009803° -0.09688597 +0.57875960
P =7.49 years

Contact

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

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