Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
P/2008 QP20 (LINEAR-Hill)
Classification: Jupiter-family Comet          SPK-ID: 1002994
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2454778.5 (2008-Nov-08.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5063144157253593 4.9163e-06  
a 3.490344250856611 4.5666e-05 au
q 1.723132640803779 5.4693e-06 au
i 7.749718398753028 2.1308e-05 deg
node 325.1517558469835 0.0002637 deg
peri 72.04034716655912 0.0011214 deg
M .8010426969768827 0.00026469 deg
tp 2454773.200267048962
(2008-Nov-02.70026705)
0.0016676 TDB
period 2381.775490337865
6.52
0.046743
0.000128
d
yr
n .1511477473256443 2.9663e-06 deg/d
Q 5.257555860909442 6.8787e-05 au
  Orbit Determination Parameters
   # obs. used (total)      484  
   data-arc span      180 days  
   first obs. used      2008-08-25  
   last obs. used      2009-02-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      3  
   norm. resid. RMS      .67665  
   source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-18 11:57:17  

Additional Information
 Earth MOID = .748516 au 
 T_jup = 2.890 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.9   0.9 28 from 112 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 17.   n/a 28 autocmod 2.5c
comet nuclear magnitude M2 17.2   0.7 28 from 284 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 28 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 28 autocmod 2.5c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2008.8   P/2008 QP20       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-20 02:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin