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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09500135309595242 3.5355e-08  
a 2.732338940545408 1.4161e-08 au
q 2.472763044076833 9.7175e-08 au
i 6.024389388277012 4.0173e-06 deg
node 81.5080787351658 3.9233e-05 deg
peri 347.5609007765905 4.5208e-05 deg
M 269.2917305610529 2.4103e-05 deg
tp 2459416.166155740695
(2021-Jul-20.66615574)
0.00011173 TDB
period 1649.682184349996
4.52
1.2825e-05
3.511e-08
d
yr
n .2182238514880043 1.6965e-09 deg/d
Q 2.991914837013983 1.5506e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1558  
   data-arc span      20490 days (56.10 yr)  
   first obs. used      1962-12-04  
   last obs. used      2019-01-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49362  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:52:31  

Additional Information
 Earth MOID = 1.48749 au 
 Jupiter MOID = 2.24911 au 
 T_jup = 3.339 
[ 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 13.8   n/a MPO435774  
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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