Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
18D/Perrine-Mrkos
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000144
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2440240.5 (1969-Jan-19.0) TDB
Reference: JPL J682/18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.642580982439164 7.5964e-07  
a 3.55954221481951 4.0587e-07 AU
q 1.27224808138711 2.587e-06 AU
i 17.7589827722319 0.00011715 deg
node 240.8755466309168 0.00012112 deg
peri 166.0504171249452 0.00036915 deg
M 11.51461302314525 6.2953e-05 deg
tp 2440162.042133371453
(1968-Nov-01.54213337)
0.00043205 JED
period 2452.955381957053
6.72
0.00041954
1.149e-06
d
yr
n .1467617400006597 2.5101e-08 deg/d
Q 5.84683634825191 6.6667e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      16  
   data-arc span      2584 days (7.07 yr)  
   first obs. used      1961-11-29  
   last obs. used      1968-12-26  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      1  
   fit RMS      1.6514  
   data source      ORB  
   producer      M.S.W. Keesey  
   solution date      2002-Feb-22 17:02:43  

Additional Information
 Earth MOID = .28923 AU 
 T_jup = 2.669 
[ 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 11.5 mag n/a ICQ 2002 Handbook  
comet total magnitude slope K1 20.0   n/a ICQ 2002 Handbook  
comet nuclear magnitude M2 15.5 mag n/a ICQ 2002 Handbook  
comet nuclear magnitude slope K2 15.0   n/a ICQ 2002 Handbook  

[ 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
1909-Sep-23 23:43 00:57 Mars 0.391521533777658 0.390932513683371 0.392113761335063 15.8437038782048 n/a 2418573.4885 57.1506343956129 60562.4831512011 311.067668880638 -59.7887039600379 155148.866659635 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
1909-Nov-14 23:27 00:40 Earth 0.209443903633803 0.208808990313854 0.210085704830087 10.2591598324075 n/a 2418625.47718 40.1660131695775 46198.9166257859 190.666558454421 61.7920683341766 98057.169622689 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
1947-Sep-06 23:14 00:11 Jupiter 1.62478616018279 1.62467937863321 1.62489293638322 10.9847280956361 n/a 2432435.46818 11.5897381885529 1692.04478972303 76.7449117073275 -10.430945482364 106409.00066433 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
1959-Jun-13 19:44 00:10 Jupiter 0.381609106424924 0.381553130691198 0.381665087491249 6.45064544576019 n/a 2436733.32277 10.80378114012 353.214800614737 42.1474311506892 39.3957899018124 92078.2728275725 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
1968-Nov-14 03:06 < 00:01 Earth 0.314449154988512 0.314440778464943 0.314457531481612 10.3941828310495 n/a 2440174.62943 0.596068003658546 325.387935277583 70.2746277526832 10.6498390963992 128441.311717304 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2006-Dec-30 08:09 00:07 Jupiter 0.138926818977164 0.138882686243423 0.138970961441068 7.29201264875208 n/a 2454099.84026 7.05498953058918 324.323676065854 109.880196362731 48.0323628819219 17301.8257445507 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2017-Mar-29 11:40 00:42 Mars 0.391516371525608 0.39005810242176 0.392975131864265 11.6789246784373 n/a 2457841.98617 42.7920919140356 73501.9358406496 2214.96591384642 -19.4072944863814 8104.19285322769 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2030-Sep-07 12:17 00:09 Jupiter 0.271583105709155 0.26943425780466 0.273729713826336 7.74244780836599 n/a 2462752.01185 9.68095186434779 14325.904452648 60.4691866043739 -8.68977774069746 11940.3120678846 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2039-Aug-16 21:51 1_09:04 Mars 0.251346774828008 0.23702829586792 0.266989294680536 12.868863316966 n/a 2466017.41052 1984.32180541257 1126811.28618864 818.466986412053 -49.3985099763063 32504.9564095577 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2041-Jun-06 14:35 04:42 Jupiter 1.92551883629563 1.90812128882101 1.94283079551999 10.667881561411 n/a 2466677.10819 282.693700260845 244342.23993435 1324.15349582479 16.5428631445279 10888.6435077247 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2065-Dec-30 19:46 1_06:23 Jupiter 1.88540700782411 1.83644495036431 1.93342859128516 11.5967683724592 n/a 2475650.32405 1823.6894032615 717092.988334288 346.519322776949 -2.50040005108616 6592.86954144241 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16
2076-Dec-28 05:37 1_07:29 Jupiter 0.930805614525998 0.91627567754367 0.946553378703489 6.83808771274863 n/a 2479665.73454 1889.44932297066 253914.564606479 605.410935151423 54.7044059682883 21337.4985288723 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1968.8       1968 VIII   1968h 
 1962.1       1962 I   1961h 
 1955.4   18D/1955 U1   1955 VII   1955i 
 1908.4   18D/1909 P1   1909 III   1909b 
 1895.0   18D/1896 X1   1896 VII   1896g 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Nov-24 16:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin