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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 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3812385063810066 1.7656e-07  
a 3.634473678659963 1.0894e-07 AU
q 2.248872361926556 6.4118e-07 AU
i 13.96682257238026 1.5031e-05 deg
node 116.7657597518544 2.1229e-05 deg
peri 208.2784435313408 5.3062e-05 deg
M 124.1225150977846 1.6063e-05 deg
tp 2455844.912906123571
(2011-Oct-10.41290612)
0.00012742 JED
period 2530.816859036731
6.93
0.00011379
3.115e-07
d
yr
n .1422465630867583 6.3955e-09 deg/d
Q 5.02007499539337 1.5047e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 6.269397309125737E-9 8.497E-11
A2 [EST] -1.961607995360316E-10 2.036E-12
  Orbit Determination Parameters
   # obs. used (total)      1275  
   data-arc span      23446 days (64.19 yr)  
   first obs. used      1949-09-24  
   last obs. used      2013-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .69299  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 12:25:48  

Additional Information
 Earth MOID = 1.24442 AU 
 T_jup = 2.931 
[ 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 
 1991.0       1990 XXIII   1990h 
 1984.1       1983 XVIII   1983h 
 1977.1       1977 I   1976h 
 1970.2       1970 IV   1970h 
 1963.3       1963 IV   1963c 
 1956.3   48P/1956 P1   1956 V   1956f 
 1949.4   48P/1949 Q1   1949 II   1949d 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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