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/2012 H2 (McNaught)
Classification: Halley-type Comet*          SPK-ID: 1003187
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456065.5 (2012-May-18.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8936094438037731 0.00044567  
a 16.13650908325982 0.068329 au
q 1.71677217643348 7.8089e-05 au
i 92.83558531160249 0.00054812 deg
node 184.1359475078656 0.001784 deg
peri 295.9019823745012 0.0023129 deg
M .2169493908813492 0.0014649 deg
tp 2456051.231814682628
(2012-May-03.73181468)
0.0060318 TDB
period 23676.24400044121
64.82
150.38
0.4117
d
yr
n .01520511445959466 9.6578e-05 deg/d
Q 30.55624599008615 0.12939 au
  Orbit Determination Parameters
   # obs. used (total)      40  
   data-arc span      78 days  
   first obs. used      2012-04-29  
   last obs. used      2012-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .50208  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:32:07  

Additional Information
 Earth MOID = 1.09512 au 
 Jupiter MOID = .135396 au 
 T_jup = 0.244 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 15.7   0.6 8 from 21 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 8 autocmod 2.9c
comet nuclear magnitude M2 17.8   0.3 8 from 16 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2012.3   C/2012 H2       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-18 21:34 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin