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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1915-Jul-04 02:34 07:33 Venus 0.0873559040457697 0.0863106719267058 0.0884360032391968 13.6925665479479 13.6907509460969 2420682.606707139 453.459620680592 101938.995184056 1712.57428886145 58.6811301570753 7892.89950319163 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1920-Aug-17 16:34 03:44 Earth 0.147644904734845 0.147456488197196 0.147847253195209 18.659503179683 18.6585360046608 2422554.190008589 224.342084842955 91046.2844754756 5957.06605147332 -85.145145170402 3679.25190724821 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1922-Oct-03 01:03 02:44 Jupiter 0.946971056274209 0.946809461351195 0.947132671523456 7.17741679134937 7.05169503106882 2423330.543895015 163.566381767834 16322.0297962632 6961.11222775272 74.9687696100617 16996.9083519347 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1935-Mar-06 00:25 01:55 Jupiter 1.04868774428287 1.04845646228039 1.0489190507816 8.79131276942183 8.69895310489556 2427867.517574577 114.697895509272 16327.6426922554 8159.57231570807 55.7633416573998 12145.9974113668 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1936-Sep-12 19:22 06:49 Earth 0.237418328530159 0.236883698094072 0.23795640950963 14.7438503929562 14.7430891936053 2428424.307113824 408.730083860166 52777.8757597242 3374.58429307094 59.7515539537388 8377.12692743208 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1957-Aug-15 12:30 01:20 Earth 0.194817086895667 0.194572859251902 0.195063449537708 19.9746540301131 19.9739693093622 2436066.020538813 80.2513775668901 35409.5323057601 3077.62386293539 -70.392294997274 8765.19701040708 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1970-Apr-03 02:01 01:03 Jupiter 0.978000226582891 0.977906791956669 0.978093665801084 7.26196656021986 7.14170892286912 2440679.584132201 62.6608259775221 6055.0229794107 2242.2080770115 44.4132922573332 39291.6069411827 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1979-Jan-03 20:42 00:22 Earth 0.217635735253828 0.217440447610638 0.21783106529355 23.343838702699 23.34331423982 2443877.362329908 22.0188214301941 10863.6167065067 950.000589444336 26.4083412737351 14798.7546756356 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1982-Aug-21 16:13 00:21 Jupiter 1.02799127763256 1.02791501125851 1.02806754471156 8.85421482127201 8.76066221194134 2445203.175686518 21.4689087685875 4693.60449834965 3256.1832656403 55.6715028371294 33628.2010791401 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
1994-Aug-07 13:10 < 00:01 Earth 0.311344807902856 0.311331524921228 0.311358090886997 24.415420649806 24.4150701323625 2449572.048694897 0.783684708082547 663.996767095137 205.806613414971 4.22703629062143 68939.7349543616 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2000-Jan-16 02:00 00:03 Earth 0.329549508931571 0.329524374224695 0.32957464384992 27.7848051193193 27.7845141235954 2451559.583678308 2.6408363455552 1334.8847605046 529.654002630798 22.0170840597972 46830.6453588844 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2017-Oct-13 16:12 01:02 Jupiter 0.930833671177025 0.930707927955282 0.930959416024694 7.02691586822127 6.89620361050711 2458040.175124699 61.857390960538 6621.40722945432 2279.67342944316 21.9466536889819 24381.86449941 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2030-Jan-25 01:12 00:34 Jupiter 1.15947145501243 1.15927777465195 1.15966515009657 9.35975989489407 9.28138222067863 2462526.549836993 33.8490442530072 11865.6409313865 3011.5604620818 37.464856663326 31156.5293703046 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2036-Dec-12 19:38 00:30 Earth 0.130562651703688 0.13050952801445 0.130615838027692 17.6336364229611 17.6324790701655 2465040.318078062 29.9394636764624 7914.62823839616 2111.0515434779 -77.8693327696851 8639.65256971804 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2057-Oct-06 13:31 02:21 Earth 0.259133850883085 0.259088278987517 0.259179731820416 16.3737829621794 16.3731549797296 2472643.063516068 140.897489459407 19372.0061014245 1549.48377696068 -85.0300264617346 17854.4786955779 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2065-Apr-22 20:51 02:53 Jupiter 0.877640054993454 0.877323186132427 0.877956931834325 6.86269186548417 6.72058866986508 2475398.369077905 172.567896025547 16389.2273717982 3556.83294143136 18.0383278229454 11048.2097511851 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2073-Aug-16 08:25 01:58 Earth 0.40486052828836 0.404087394896401 0.405635031059258 24.0171375369539 24.0168635132378 2478435.850401282 118.481701068573 53808.3796020559 5420.91407842065 -44.468872302467 7414.9572178631 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2077-Jul-02 09:28 01:58 Jupiter 1.23787434071086 1.23748382406199 1.23826487276791 9.60140882234255 9.52987618319312 2479851.894158586 117.635557446175 21729.7635801647 13289.3967313904 34.8896792752638 8259.69761572583 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2094-Oct-04 14:29 06:31 Earth 0.257240247636376 0.256996897937382 0.257489737266184 16.7630858087641 16.7624678955623 2486155.103602098 390.778646674645 65311.6391494147 2618.52061664597 -79.3987031642718 10635.3226917223 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2100-Jan-22 05:07 03:12 Venus 0.0926346910103259 0.0925559829169292 0.0927450033553121 16.4170639045894 16.4156359358908 2488090.712949808 192.187220221218 89055.0449377108 1252.52917807357 87.0886273999093 14594.4575297837 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2112-Oct-10 01:05 02:32 Jupiter 0.90381773852937 0.903547816226215 0.904087668601052 7.01137524555728 6.87641340529368 2492734.545389709 152.149785832665 18543.6153492782 12335.136294959 70.1038736581615 7726.12716119143 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2115-Dec-15 17:51 10:40 Earth 0.162379291334434 0.158857770158816 0.165971156730471 19.3845924189133 19.3837459041749 2493896.243581602 640.072377313041 244720.240234715 5219.08875999535 43.5536580384525 2995.49664597393 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2124-Dec-28 00:54 06:12 Jupiter 1.09852468112825 1.09726143812874 1.09978797280865 9.16710906267096 9.08260862053267 2497196.537681759 372.048745576286 64151.4184587036 15943.8320124651 -13.1080944438039 2467.15165502245 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2131-Dec-12 09:21 17:08 Earth 0.146069234976489 0.144060832689059 0.148341580959852 18.8192439408999 18.8182746310747 2499736.889844688 1028.26160041961 327983.893156761 5548.74310661865 71.016338502955 3437.42728277873 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2152-Dec-12 22:05 19:21 Earth 0.149545209825466 0.146728758405434 0.152690723967259 19.0183531245677 19.0174162582176 2507408.420326832 1161.47687816336 380511.631455188 6706.7893499467 66.9999776556313 2847.93703806096 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2160-Mar-21 00:33 04:05 Jupiter 1.04977154584266 1.04929597432734 1.05024781107998 7.5822203334805 7.4750476826243 2510063.522987897 245.244481031319 52243.8775625448 8970.75983373081 65.6394118805793 8564.03162828408 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2168-Dec-04 15:39 22:15 Earth 0.118702894478736 0.114243203705506 0.123587960012878 17.9044328593683 17.9031791245572 2513244.151821981 1335.34937708589 424313.417538618 5765.22459564264 56.6360732928932 2359.39100157326 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2172-Jun-28 23:00 08:00 Jupiter 0.836541066288752 0.835075605537865 0.838006624380947 8.42556114695201 8.30451814504311 2514546.458370593 480.282822698171 74651.8097725848 20689.4942217193 -14.4868408826584 1645.83996509245 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52
2189-Dec-23 23:08 12:04 Earth 0.238014942790566 0.23430950140224 0.241788751400921 21.8196903419152 21.8191772860505 2520933.464051951 724.339968628994 274519.497476125 10098.0580416846 47.2465588699879 2429.01179538497 T 12 CATAB v2.0f-lin.ifort 2021-Jan-19 14:52:02 2021-Jan-19 14:52

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-25 01:51 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin