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48P/Johnson
Classification: Jupiter-family Comet          SPK-ID: 1000049
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457164.5 (2015-May-22.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4252128228718672 3.6267e-07  
a 3.53174298156458 3.5889e-07 AU
q 2.0300005787156 1.4823e-06 AU
i 13.05900296291951 1.9927e-05 deg
node 114.9164946148813 3.4464e-05 deg
peri 210.3702533539293 2.5671e-05 deg
M 186.3162928006837 3.1826e-05 deg
tp 2458334.103455338967
(2018-Aug-03.60345534)
0.00018458 JED
period 2424.276005571613
6.64
0.00036953
1.012e-06
d
yr
n .1484979429621986 2.2635e-08 deg/d
Q 5.03348538441356 5.115e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 6.325999247883727E-9 8.537E-11
A2 [EST] -1.974001960583088E-10 2.189E-12
  Orbit Determination Parameters
   # obs. used (total)      1281  
   data-arc span      23859 days (65.32 yr)  
   first obs. used      1949-09-24  
   last obs. used      2015-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .68355  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-May-12 21:22:18  

Additional Information
 Earth MOID = 1.02818 AU 
 T_jup = 2.926 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8.5 mag n/a ICQ 2005 Handbook  
comet total magnitude slope K1 15.0   n/a ICQ 2005 Handbook  
diameter diameter 5.74 km n/a Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A.; (2004) Comets II, pp. 223-264  

48P/Johnson          Discovered 1949-Aug-25 by Johnson, Ernest Leonard at Union Observatory, South Africa
discovered on plate/photo taken on discovery date
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1992.0       1990 XXIII   1990h 
 1985.4       1983 XVIII   1983h 
 1978.8       1977 I   1976h 
 1972.1       1970 IV   1970h 
 1965.5       1963 IV   1963c 
 1958.9   48P/1956 P1   1956 V   1956f 
 1952.2   48P/1949 Q1   1949 II   1949d 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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