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

Introduction

The following improved orbital elements, are from 1362 observations 1993 May 10 to 2015 May 18, including full planetary and non-gravitational effect of type II, and relativity effect of the sun.

The mean residual is 0.66 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 10.16636 TT ±0.00000 TT
Argument of perihelion (ω) 357.6676534° ±0.0000768°
>Longitude of the node (Ω) 356.9742832° ۪.0000846°
Inclinaison (i) 13.0303189° ±0.0000053°
Perihelion distance (q) 2.8182269 ua ±0.0000002 ua
Eccentricity (e) 0.3170580 ±0.0000004
Semimajor axis (a) 4.1265978 ua ±0.0000025 ua
Mean motion (n) 0.11757524°/jour ±0.00000011°/jour
Period (P) 8.383 years ±0.0000077 (0.0028 day)

Non-gravitational parameters :

A1 = 0.15700 .10-8 ±0.01984 .10-8
A2 = -0.02224 .10-8 ±0.00087 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 10.41± 0.06 calculated using 332 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 27 at 0h TT, julian day 2460975.5 TT.

T =2025 October 27.99981 TT.
q :2.8074622 ua (J2000) P Q
n : 0.11799936°/jour ω : 357.9182255° +0.99593346 +0.08925137
a : 4.1167038 ua Ω : 356.8805666° -0.07905483 +0.80041086
e : 0.3180315 i : 13.0393328° -0.04320742 +0.59277032
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 31.96909 TT.
q :2.7990895 ua (J2000) P Q
n : 0.11821626°/jour ω : 357.6856359° +0.99572821 +0.09156417
a : 4.1116668 ua Ω : 356.9825715° -0.08067158 +0.80009755
e : 0.3192324 i : 13.0525284° -0.04491578 +0.59284054
P =8.34 years

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

T =2001 January 6.49355 TT.
q :2.3053677 ua (J2000) P Q
n : 0.13214437°/jour ω : 348.8840921° +0.98877195 +0.14910827
a : 3.8174229 ua Ω : 2.6019635° -0.11501972 +0.80143915
e : 0.3960932 i : 12.5133966° -0.09539649 +0.57919083
P =7.46 years

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

T =1993 July 14.05501 TT.
q :2.3162903 ua (J2000) P Q
n : 0.13160155°/jour ω : 348.6902727° +0.98842402 +0.15138241
a : 3.8279129 ua Ω : 2.6653358° -0.11675214 +0.80132438
e : 0.3948947 i : 12.5009762° -0.09688597 +0.57875954
P =7.49 years

Contact

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

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