- 2011-12-29 : natural Earth satellites
- 2011-12-21 : 2011 Draconids: the movie!
- 2011-11-30 : A new comet seen in the eye of a small telescope automatically
- 2011-10-27 : Faraway Eris is Pluto's Twin
- 2011-10-26 : A meteor captured by the new IMCCE camera
- 2011-10-11 : The Secrets of Asteroid Minerva and its Two Moons
- 2011-10-07 : 2011 Draconids
- 2011-08-31 : preparation for the coming Draconids meteor outburst
- 2011-06-26 : 2011 MD will pass extremely close by Earth on Monday June 27
- 2011-04-22 : The famous Cretaceous-Paleogene boundary older than we thought
- 2011-04-21 : Flighing over Pic du midi observatory
- 2011-04-14 : Creation of the African Astronomical Society
- 2011-03-17 : Giant Full Moon on March 19th
- 2010-12-30 : The 2010 Geminids observation campaign
- 2010-12-16 : Paris under snow, Venus under clouds
- 2010-12-11 : 2010 Geminids
- 2010-11-28 : Snowstorm on Hartley 2
- 2010-11-04 : NASA Mission Successfully Flies by Comet Hartley 2
- 2010-08-19 : 2010 Perseids
- 2010-07-11 : Lutetia as though you were there
- 2010-07-10 : Lutetia takes the Stage
- 2010-06-30 : A giant water ice shell under the surface of the asteroid (90) Antiope ?
- 2010-06-11 : The comet McNaught C/2009 R1
- 2010-06-04 : New impact detected on Jupiter
- 2010-05-26 : South African Astronomical Observatory Selected as Host for the IAU Office for Astronomy Development
- 2010-05-21 : The mystery of the disapperance of the south band of Jupiter
- 2010-03-26 : An avalanche of asteroids
- 2010-01-20 : Zoom on Near-Earth Asteroids
- 2010-01-18 : Asteroid 2867 Steins seen by Rosetta
- 2009-08-21 : Le calendrier musulman et le calcul des dates du mois de Ramadan
- 2009-06-17 : Solstice d'été
- 2009-05-27 : La direction de La Mecque grâce au Soleil
- 2009-04-22 : The solar wind is the cause of rapid ageing of the asteroids
- 2009-04-06 : To photograph the sunset on the Grand Canal in Versailles
- 2009-03-09 : Paris Astronomers "Catch" Passing Asteroid
- 2009-03-09 : Summer time
- 2009-03-09 : Spring equinox
- 2009-02-09 : Comète LULIN
- 2009-02-02 : Lever du Soleil dans l'axe de l'arche de l'Arc de Triomphe
- 2008-07-31 : Webcast from Novosibirsk of the total eclipse of the Sun on August 1, 2008
- 2008-07-17 : Calculation of the visibility of the first crescent of the Moon in August-September 2008
- 2008-07-17 : The sun under the Arc de Triomphe
- 2008-07-17 : To photograph the sunset on the Grand Canal in Versailles
- 2008-07-17 : Partial eclipse of the Moon on 2008, August 16th
- 2008-07-02 : Earth in aphelion on July 4th
- 2008-06-10 : Summer solstice on June 20th
- 2008-06-02 : Update of the lectures on relativity in celestial mechanics and astrometry.
- 2008-06-02 : Publication of the IMCCE scientific and technical Note S093
- 2008-05-05 : The sun under the Arc de Triomphe
- 2008-02-25 : To photograph the sunset on the Grand Canal in Versailles
- 2008-02-25 : Spring equinox
- 2008-02-25 : Summer time
- 2007-12-06 : 2008 Nautical Ephemerids
- 2007-12-06 : Publication of Guide de Données Astronomiques 2008 - Annuaire du Bureau des Longitudes
- 2007-12-06 : Agenda astronomique 2008
- 2007-12-04 : The Quadrantids
- 2007-12-04 : Earth at perihelion
- 2007-12-04 : Winter solstice
- 2007-10-02 : Clock change back to winter
- 2007-09-21 : Autumnal equinox
- 2007-07-25 : The sixtieth satellite of Saturn
- 2007-07-03 : Earth in aphelion on July 6th
- 2007-05-24 : Summer solstice on June 21th
- 2007-03-20 : To photograph the sunset on the Grand Canal in Versailles
- 2007-03-09 : A new triple asteroid discovered in the Main Belt
- 2007-02-26 : Lyrides as beginnings of meteor shower
- 2007-02-26 : Summer time
- 2007-02-26 : Spring equinox
- 2007-01-22 : New version of the ephemerides «Connaissance des Temps »
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Note number : 0089
P/Swift-Tuttle : 109P
- Introduction
- Elements
- Formulæ for magnitudes
- Elements for the previous transit(s) through perihelion
- Comparison with observations
- Ephemerides of the comet (ou click to open TEXT file TEXTE)
- Load the Postscript file of the note
Introduction
The following improved orbital elements, are from 893 observations 1862 August 30 to 1995 April 5, including full planetary and non-gravitational effect of type II, but not the relativity effect of the Sun. The mean residual is 2.09 arc second.
Elements
Orbital elements given with respect to the mean ecliptic and equinox of J2000.Epoch : 1992 December 4 at 0h TT, julian day 2448960.5.
| Perihelion passage (T) | 1992 December 12.32495 TT | ±0.00002 TT |
| Argument of perihelion (ω) | 153.0025770° | ±0.0000388° |
| >Longitude of the node (Ω) | 139.4443607° | ۪.0000556° |
| Inclinaison (i) | 113.4269419° | ±0.0000454° |
| Perihelion distance (q) | 0.9582067 ua | ±0.0000006 ua |
| Eccentricity (e) | 0.9635239 | ±0.0000039 |
| Semimajor axis (a) | 26.2694269 ua | ±0.0028494 ua |
| Mean motion (n) | 0.00732029°/jour | ±0.00000119°/jour |
| Period (P) | 134.643 years | ±0.0219067 (8.0014 days) |
Non-gravitational parameters :
A2 = -0.32885 .10-8 ±0.02063 .10-8
Formulæ for magnitudes
Total magnitude :m1 = H1 + 5log(Δ) + 10 log(r) avec H1 = 4.83± 0.05 calculé à l'aide de 18 observation(s).
Nuclear magnitude :
m2 = H2 + 5log(Δ) + 5 log(r) avec H2 = 12.10±0.04 calculé à l'aide de 9 observation(s).
Elements for the previous transit(s) through perihelion
Epoch :1862 August 23 at 0h TT, julian day 2401375.5 TT.
| T =1862 August 23.42694 TT. | |||
| q :0.9626587 ua | (J2000) | P | Q |
| n : 0.00748994°/jour | ω : 152.7796613° | +0.79398069 | +0.11564277 |
| a : 25.8712457 ua | Ω : 139.3714669° | -0.57068756 | -0.19661478 |
| e : 0.9627904 | i : 113.5667422° | +0.20954801 | -0.97363719 |
| P =131.50 years | |||
Contact
Send your suggestion to the author of the notes : Patrick Rocher
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