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JPL Small-Body Database Browser
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C/1991 L3 (Levy)
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000129
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2448619.5 (1991-Dec-29.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9288584031320765 4.5177e-06  
a 13.81307682192355 0.00092056 au
q .982684342770944 4.4799e-06 au
i 19.19010771073673 0.00010318 deg
node 329.4315971723207 0.00019285 deg
peri 41.47881846837238 0.0003127 deg
M 3.336757152522234 0.00033548 deg
tp 2448445.697440846998
(1991-Jul-08.19744085)
0.00016708 TDB
period 18751.41595119838
51.34
1.8745
0.005132
d
yr
n .01919855017545983 1.9192e-06 deg/d
Q 26.64346930107617 0.0017756 au
  Orbit Determination Parameters
   # obs. used (total)      136  
   data-arc span      587 days (1.61 yr)  
   first obs. used      1991-06-14  
   last obs. used      1993-01-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      3  
   norm. resid. RMS      .74332  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:41  

Additional Information
 Earth MOID = .0753173 au 
 Jupiter MOID = .0498572 au 
 T_jup = 1.517 
[ 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 8.9   1. 10 2 parameter fit from 26 observations, autocmod 2.9c
comet total magnitude slope K1 14.5   n/a 10 autocmod 2.9c
comet nuclear magnitude M2 14.5   0.3 10 from 3 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.9c
diameter diameter 11.6 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

[ 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
2042-Nov-21 11:56 8_06:45 Earth 0.469697512739708 0.405247077126876 0.543241472853678 22.453933844403 22.4536812032464 2467209.997193066 11924.5575961233 4744487.43599031 334.868437870338 -42.9300197745725 116846.126214242 T 10 CATAB v2.0g-lin.ifort 2021-Apr-15 23:29:41 2021-Apr-15 23:29
2094-Aug-03 00:02 5_06:42 Earth 0.44406511351688 0.350444317725002 0.538075284537952 28.2007413189278 28.2005285506812 2486092.501176784 7602.41789489601 4723938.72002015 533.54771548172 -7.80103092190522 16107.3464122162 T 10 CATAB v2.0g-lin.ifort 2021-Apr-15 23:29:41 2021-Apr-15 23:29
2097-Mar-04 18:51 3_20:10 Saturn 1.41966152412887 1.39776540756535 1.44174038064679 12.7716959189192 12.757700585673 2487037.285432337 5530.45857324547 1359404.59044375 1440.47084625543 36.2589391506045 79928.4345466244 T 10 CATAB v2.0g-lin.ifort 2021-Apr-15 23:29:41 2021-Apr-15 23:29

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1991.5   C/1991 L3   1991 XI   1991q 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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