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

Introduction

The following improved orbital elements, are from 624 observations 1995 May 23 to 2015 February 21, 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 : 2015 May 22 at 0h TT, julian day 2457164.5.

Perihelion passage (T) 2015 May 22.26863 TT ±0.00000 TT
Argument of perihelion (ω) 115.2184333° ±0.0007061°
>Longitude of the node (Ω) 188.8021321° ۪.0006542°
Inclinaison (i) 2.8480925° ±0.0000322°
Perihelion distance (q) 1.7288387 ua ±0.0000017 ua
Eccentricity (e) 0.4992755 ±0.0000033
Semimajor axis (a) 3.4526743 ua ±0.0000258 ua
Mean motion (n) 0.15362810°/jour ±0.00000172°/jour
Period (P) 6.416 years ±0.0000719 (0.0263 day)

Non-gravitational parameters :

A1 = 1.46862 .10-8 ±0.01492 .10-8
A2 = 0.00644 .10-8 ±0.00030 .10-8
A3 = -0.13803 .10-8 ±0.00625 .10-8

Formulæ for magnitudes

Total magnitude :
m1 = H1 + 5log(Δ) + 10 log(r) with H1 = 13.84± 0.05 calculated using 234 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) with H2 = 14.52±0.02 calculated using 67 observation(s).

Elements for the next transit through perihelion

Epoch :2021 October 21 at 0h TT, julian day 2459508.5 TT.

T =2021 October 17.42313 TT.
q :1.7200960 ua (J2000) P Q
n : 0.15400329°/jour ω : 115.2521161° +0.55937636 +0.82887909
a : 3.4470644 ua Ω : 188.7723655° -0.77728703 +0.52133593
e : 0.5009968 i : 2.8509979° -0.28796347 +0.20289973
P =6.40 years

Elements for the previous transit(s) through perihelion

Epoch :2008 December 25 at 0h TT, julian day 2454825.5 TT.

T =2008 December 25.95609 TT.
q :1.7237927 ua (J2000) P Q
n : 0.15384762°/jour ω : 115.3028994° +0.56085681 +0.82787773
a : 3.4493892 ua Ω : 188.8240293° -0.77634482 +0.52270215
e : 0.5002615 i : 2.8480946° -0.28762536 +0.20347218
P =6.41 years

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

T =2002 July 31.17998 TT.
q :1.7294648 ua (J2000) P Q
n : 0.15362084°/jour ω : 115.2465625° +0.56152180 +0.82742611
a : 3.4527831 ua Ω : 188.9265186° -0.77591881 +0.52328823
e : 0.4991099 i : 2.8446329° -0.28747742 +0.20380248
P =6.42 years

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

T =1996 March 5.73139 TT.
q :1.7196457 ua (J2000) P Q
n : 0.15415935°/jour ω : 115.2163646° +0.56198413 +0.82711164
a : 3.4447376 ua Ω : 188.9888359° -0.77564052 +0.52370788
e : 0.5007905 i : 2.8457769° -0.28732495 +0.20400095
P =6.39 years

Contact

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

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