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 ]  
141P/Machholz 2-D
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000279
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 2451425.5 (1999-Sep-04.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7510941447488013 1.6256e-07  
a 3.009008906875979 2.7538e-06 au
q .7489599354244401 8.4586e-07 au
i 12.81198253165266 7.9562e-05 deg
node 246.14177171 0.00054466 deg
peri 149.2924228695888 0.00055124 deg
M 341.692431015803 0.00010147 deg
tp 2451522.453125768286
(1999-Dec-09.95312577)
0.00061753 TDB
period 1906.486071783274
5.22
0.0026172
7.166e-06
d
yr
n .1888290742471913 2.5922e-07 deg/d
Q 5.269057878327518 4.8222e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 3.775468059063227E-9 3.737E-10
A2 [EST] -6.327883472415679E-10 1.437E-12
A3 [EST] -1.139938967623395E-8 9.717E-10
  Orbit Determination Parameters
   # obs. used (total)      157  
   data-arc span      9607 days (26.30 yr)  
   first obs. used      1994-08-30  
   last obs. used      2020-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      1.0095  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Jan-19 14:46:58  

Additional Information
 Earth MOID = .108077 au 
 Jupiter MOID = .635441 au 
 T_jup = 2.708 
[ hide covariance matrix ]
Orbit Covariance (9×9)
  e q tp node peri i A1 A2 A3
e 2.64264604415596E-14 -8.057873055431389E-14 1.107262893356898E-11 6.960653537492903E-12 3.463094183868876E-12 8.018198668076169E-13 2.299992020783471E-18 -2.660220075004225E-20 2.21662600191386E-18
q -8.057873055431389E-14 7.154833627680558E-13 2.507098535732466E-10 -1.194308102509817E-10 1.129973236839394E-10 6.444491421211664E-12 -2.571725226870908E-16 -5.880835151187586E-19 1.64468662755549E-16
tp 1.107262893356898E-11 2.507098535732466E-10 3.813424174466914E-7 -5.012464729756736E-8 9.973593816479037E-8 2.327773786334498E-8 -1.170482137147074E-13 -8.124058179470734E-16 1.028804664934523E-13
node 6.960653537492903E-12 -1.194308102509817E-10 -5.012464729756736E-8 2.966547567902923E-7 -2.917099219579244E-7 1.933435622443924E-8 5.028400113529403E-14 2.953729843439724E-16 -3.801632642825636E-13
peri 3.463094183868876E-12 1.129973236839394E-10 9.973593816479037E-8 -2.917099219579244E-7 3.038640096919625E-7 -1.597332148341881E-8 -5.899892437607806E-14 -3.862975475205532E-16 3.740099579163094E-13
i 8.018198668076169E-13 6.444491421211664E-12 2.327773786334498E-8 1.933435622443924E-8 -1.597332148341881E-8 6.330076362914117E-9 -1.989678725148819E-15 -3.031969894623585E-17 -3.331487322268812E-14
A1 2.299992020783471E-18 -2.571725226870908E-16 -1.170482137147074E-13 5.028400113529403E-14 -5.899892437607806E-14 -1.989678725148819E-15 1.396677179246895E-19 2.755726004227527E-22 -7.087707961801253E-20
A2 -2.660220075004225E-20 -5.880835151187586E-19 -8.124058179470734E-16 2.953729843439724E-16 -3.862975475205532E-16 -3.031969894623585E-17 2.755726004227527E-22 2.066075166578033E-24 -7.463317641520962E-22
A3 2.21662600191386E-18 1.64468662755549E-16 1.028804664934523E-13 -3.801632642825636E-13 3.740099579163094E-13 -3.331487322268812E-14 -7.087707961801253E-20 -7.463317641520962E-22 9.441217379646947E-19

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 12.5   n/a IAUC 7299  
comet total magnitude slope K1 30   n/a IAUC 7299  

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1994.7   141P-D/1994 P1-D       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-18 13:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin