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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
C/2021 A1 (Leonard)
Classification: Hyperbolic Comet          SPK-ID: 1003751
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.


Orbital Elements at Epoch 2459294.5 (2021-Mar-21.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000078366889267 2.0475e-06  
a -7849.418651362284 205.07 au
q .6151345222615522 5.036e-06 au
i 132.686245978316 1.1007e-05 deg
node 255.8809492226638 0.00017375 deg
peri 225.0876992644504 0.00023717 deg
M -.000408585660636053 1.6011e-05 deg
tp 2459582.793789272622
(2022-Jan-03.29378927)
0.00078334 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.417254466934348E-6 5.554e-08 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      1048  
   data-arc span      526 days (1.44 yr)  
   first obs. used      2020-04-11  
   last obs. used      2021-09-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .56288  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-20 00:12:50  

Additional Information
 Earth MOID = .231021 au 
 Jupiter MOID = .296383 au 
[ 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 11.4   0.5 12 2 parameter fit from 921 observations, autocmod 2.9e
comet total magnitude slope K1 6.25   n/a 12 autocmod 2.9e
comet nuclear magnitude M2 12.6   0.3 12 from 38 observations, autocmod 2.9e
comet nuclear magnitude slope K2 5.   n/a 12 autocmod 2.9e
comet nuclear phase coefficient PC 0.03   n/a 12 autocmod 2.9e

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-21 18:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin