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Note number : 0011 P/Brooks 2 : 16P

Introduction

The following improved orbital elements, are from 517 observations 1994 May 6 to 2014 August 13, 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 : 2014 June 7 at 0h TT, julian day 2456815.5.

Perihelion passage (T) 2014 June 7.55016 TT ±0.00000 TT
Argument of perihelion (ω) 219.6419565° ±0.0003905°
>Longitude of the node (Ω) 159.3088455° ۪.0003650°
Inclinaison (i) 4.2581594° ±0.0000261°
Perihelion distance (q) 1.4663235 ua ±0.0000006 ua
Eccentricity (e) 0.5627260 ±0.0000018
Semimajor axis (a) 3.3533286 ua ±0.0000154 ua
Mean motion (n) 0.16050549°/jour ±0.00000111°/jour
Period (P) 6.141 years ±0.0000424 (0.0155 day)

Non-gravitational parameters :

A1 = 1.65869 .10-8 ±0.00591 .10-8
A2 = -0.18912 .10-8 ±0.00031 .10-8
A3 = 0.01328 .10-8 ±0.00729 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 12.72± 0.03 calculated using 184 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 14.26±0.06 calculated using 76 observation(s).

Elements for the next transit through perihelion

Epoch :2021 April 18 at 0h TT, julian day 2459322.5 TT.

T =2021 April 18.04105 TT.
q :1.8778377 ua (J2000) P Q
n : 0.14102821°/jour ω : 245.0832273° +0.91251381 -0.40758531
a : 3.6553759 ua Ω : 138.9459927° +0.39170308 +0.84638031
e : 0.4862806 i : 3.0143019° +0.11784416 +0.34280401
P =6.99 years

Elements for the previous transit(s) through perihelion

Epoch :2008 April 12 at 0h TT, julian day 2454568.5 TT.

T =2008 April 12.55949 TT.
q :1.4665755 ua (J2000) P Q
n : 0.16050122°/jour ω : 219.4669848° +0.94580513 -0.32367970
a : 3.3533881 ua Ω : 159.3731709° +0.31354773 +0.88929634
e : 0.5626586 i : 4.2579342° +0.08450139 +0.32308432
P =6.14 years

Epoch :2001 July 19 at 0h TT, julian day 2452109.5 TT.

T =2001 July 19.83275 TT.
q :1.8348929 ua (J2000) P Q
n : 0.14361277°/jour ω : 198.1056861° +0.96575562 -0.25940125
a : 3.6113869 ua Ω : 176.9146334° +0.24839391 +0.91860966
e : 0.4919146 i : 5.5481435° +0.07494365 +0.29810616
P =6.86 years

Epoch :1994 September 1 at 0h TT, julian day 2449596.5 TT.

T =1994 September 1.08960 TT.
q :1.8433363 ua (J2000) P Q
n : 0.14312943°/jour ω : 197.9925863° +0.96612135 -0.25803700
a : 3.6195125 ua Ω : 176.9469919° +0.24706945 +0.91892976
e : 0.4907225 i : 5.5413093° +0.07460717 +0.29830356
P =6.89 years

Contact

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

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