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C/1995 O1 (Hale-Bopp)
Classification: Comet          SPK-ID: 1000132
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2450348.5 (1996-Sep-22.0) TDB
Reference: JPL J971A/1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9952553755606356 1.2802e-06  
q .9143548960566601 1.8109e-06 au
tp 2450539.624184239235
(1997-Apr-01.12418424)
7.2694e-05 TDB
node 282.4725761982209 8.8981e-06 deg
peri 130.572277642058 0.00011142 deg
i 89.43353213218714 1.8791e-05 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.543227999206216E-8 5.525E-10
A2 [EST] 8.351583774686266E-10 7.919E-11
  Orbit Determination Parameters
   # obs. used (total)      3289  
   data-arc span      4482 days (12.27 yr)  
   first obs. used      1993-04-27  
   last obs. used      2005-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .50965  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2017-Oct-04 09:41:11  

Additional Information
 Jupiter MOID = .00736038 au 
 T_jup = 0.045 
 Not valid after 2006-1-1 
[ 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 4.0   0.8 J971B/1 from 32 observations, assumed slope, autocmod 2.6k
comet total magnitude slope K1 8.   n/a J971B/1 autocmod 2.6k
diameter diameter 60 km 20 Fernandez (2002) Earth, Moon and Planets 89:3-25  
geometric albedo albedo 0.04   0.03 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)  

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1997.2   C/1995 O1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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