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7849 Janjosefric (1996 HR)
Classification: Main-belt Asteroid          SPK-ID: 2007849
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09504757741208786 3.1363e-08  
a 2.731458056251263 1.0922e-08 au
q 2.47183958520185 9.0012e-08 au
i 6.024304362546917 3.0761e-06 deg
node 81.50266594197387 3.8184e-05 deg
peri 347.7748825603073 4.3791e-05 deg
M 312.7528873805583 2.2026e-05 deg
tp 2459416.902863391491
(2021-Jul-21.40286339)
0.00010118 TDB
period 1648.884482072657
4.51
9.8896e-06
2.708e-08
d
yr
n .2183294244770124 1.3095e-09 deg/d
Q 2.991076527300676 1.196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2068  
   data-arc span      21251 days (58.18 yr)  
   first obs. used      1962-12-04  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45927  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:05:50  

Additional Information
 Earth MOID = 1.48604 au 
 Jupiter MOID = 2.24913 au 
 T_jup = 3.340 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.87   n/a E2021B10  
diameter diameter 8.361 km 0.235 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7849 Janjosefric (1996 HR)          Discovered 1996-Apr-18 by Pravec, P., Sarounova, L. at Ondrejov
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1996 HR = 1962 XQ1 = 1980 WB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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