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

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


:
Orbital Elements at Epoch 2454724.5 (2008-Sep-15.0) TDB
Reference: JPL J971B/1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9949607008417696 1.1526e-05  
a 182.0519703474959 0.42291 au
q .9174143409263262 3.9278e-05 au
i 89.21708989130315 0.00024682 deg
node 282.9487539423989 0.00069828 deg
peri 130.662020526416 0.0022003 deg
M 1.67964178642615 0.0059279 deg
tp 2450538.437848275592
(1997-Mar-30.93784828)
0.19071 TDB
period 897204.6223184657
2456.41
3126.4
8.56
d
yr
n .0004012462609362447 1.3982e-06 deg/d
Q 363.1865263540654 0.8437 au
  Orbit Determination Parameters
   # obs. used (total)      39  
   data-arc span      3098 days (8.48 yr)  
   first obs. used      2005-02-18  
   last obs. used      2013-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .32601  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2017-Oct-04 09:43:58  

Additional Information
 Earth MOID = .116025 au 
 Jupiter MOID = .00736038 au 
 T_jup = 0.045 
 Not valid before 2005-1-1 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.328397222464775E-10 3.782993775663052E-10 2.160346481895249E-6 -6.495982923428649E-9 2.523106171671063E-8 2.250418544201172E-9
q 3.782993775663052E-10 1.542729340150869E-9 5.556898181021361E-6 -1.924991791672221E-8 7.655378348858503E-8 6.583785749720195E-9
tp 2.160346481895249E-6 5.556898181021361E-6 .03636990207346284 -.0001040916720287635 .0004051660831552962 3.624380325916597E-5
node -6.495982923428649E-9 -1.924991791672221E-8 -.0001040916720287635 4.876010657378119E-7 -1.242641480457835E-6 -1.720785995803723E-7
peri 2.523106171671063E-8 7.655378348858503E-8 .0004051660831552962 -1.242641480457835E-6 4.841436204233304E-6 4.298120372594224E-7
i 2.250418544201172E-9 6.583785749720195E-9 3.624380325916597E-5 -1.720785995803723E-7 4.298120372594224E-7 6.09216356946942E-8

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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