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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 ]

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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  

[ show close-approach data ]
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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