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Note number : 0011 P/Brooks 2 : 16P

Introduction

The following improved orbital elements, are from 364 observations 2000 July 27 to 2014 October 2, 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 : 2014 June 7 at 0h TT, julian day 2456815.5.

Perihelion passage (T) 2014 June 7.56065 TT ±0.00000 TT
Argument of perihelion (ω) 219.6494237° ±0.0004133°
>Longitude of the node (Ω) 159.3080560° ۪.0003873°
Inclinaison (i) 4.2580666° ±0.0000281°
Perihelion distance (q) 1.4663444 ua ±0.0000008 ua
Eccentricity (e) 0.5627259 ±0.0000024
Semimajor axis (a) 3.3533759 ua ±0.0000203 ua
Mean motion (n) 0.16050210°/jour ±0.00000145°/jour
Period (P) 6.141 years ±0.0000556 (0.0203 day)

Non-gravitational parameters :

A1 = 0.95473 .10-8 ±0.01484 .10-8
A2 = -0.23331 .10-8 ±0.00089 .10-8
A3 = 0.11355 .10-8 ±0.00863 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 13.38± 0.06 calculated using 172 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 14.26±0.06 calculated using 80 observation(s).

Elements for the next transit through perihelion

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

T =2021 April 18.18948 TT.
q :1.8781174 ua (J2000) P Q
n : 0.14102040°/jour ω : 245.1828036° +0.91241748 -0.40779869
a : 3.6555109 ua Ω : 138.8598978° +0.39189935 +0.84625375
e : 0.4862230 i : 3.0113951° +0.11793749 +0.34286269
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 12.57888 TT.
q :1.4665995 ua (J2000) P Q
n : 0.16049471°/jour ω : 219.4692959° +0.94578721 -0.32373210
a : 3.3534788 ua Ω : 159.3740345° +0.31359688 +0.88927946
e : 0.5626632 i : 4.2579899° +0.08451951 +0.32307827
P =6.14 years

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

T =2001 July 19.83360 TT.
q :1.8349025 ua (J2000) P Q
n : 0.14360903°/jour ω : 198.1063691° +0.96575331 -0.25940985
a : 3.6114496 ua Ω : 176.9144598° +0.24840221 +0.91860752
e : 0.4919208 i : 5.5481628° +0.07494594 +0.29810527
P =6.86 years

Contact

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

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