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
JPL Small-Body Database Browser
Search: [ help ]  
C/2021 A7 (NEOWISE)
Classification: Comet          SPK-ID: 1003759
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459279.5 (2021-Mar-06.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9996388249324278 2.9423e-05  
a 5448.011923875995 443.86 au
q 1.967686074739854 1.3789e-05 au
i 78.14861179831281 0.00016749 deg
node 154.519588917193 0.00031664 deg
peri 356.0665520845913 0.00070678 deg
M 359.9996781003908 3.9342e-05 deg
tp 2459410.832874456172
(2021-Jul-15.33287446)
0.0014189 TDB
period 146877577.5208089
402128.89
1.795e+07
4.914e+04
d
yr
n 2.451020816632117E-6 2.9953e-07 deg/d
Q 10894.05616167725 887.56 au
  Orbit Determination Parameters
   # obs. used (total)      270  
   data-arc span      153 days  
   first obs. used      2021-01-09  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .54854  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-01 22:12:55  

Additional Information
 Earth MOID = .97988 au 
 Jupiter MOID = 3.42794 au 
 T_jup = 0.358 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 13.5   0.8 10 2 parameter fit from 208 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 10 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2021.5   C/2021 A7       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-27 07:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin