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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0951556463157614 3.1354e-08  
a 2.731672291852557 1.085e-08 au
q 2.47173824939847 8.9985e-08 au
i 6.024215730524149 3.0742e-06 deg
node 81.50294804615021 3.8183e-05 deg
peri 347.80635678 4.3783e-05 deg
M 355.5217251445981 2.207e-05 deg
tp 2459417.013962976691
(2021-Jul-21.51396298)
0.00010112 TDB
period 1649.078475543011
4.51
9.8251e-06
2.69e-08
d
yr
n .2183037407491834 1.3006e-09 deg/d
Q 2.991606334306644 1.1883e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2071  
   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      .46437  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:36:24  

Additional Information
 Earth MOID = 1.48624 au 
 Jupiter MOID = 2.2489 au 
 T_jup = 3.339 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456995.5 (2014-Dec-04.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09641570385292925 3.1607e-08  
q 2.468773220606514 9.0846e-08 au
tp 2457757.077906391058
(2017-Jan-03.57790639)
9.6855e-05 TDB
node 81.55156007172944 3.8175e-05 deg
peri 345.82071099939 4.3564e-05 deg
i 6.025980246323002 3.0743e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2071  
   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      .46437  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:36:24  

Additional Information
 Jupiter MOID = 2.2489 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.990332733805111E-16 -2.857043455541402E-15 -6.889926091242405E-13 1.535120548411246E-15 -1.112214238246005E-13 -5.680327934851374E-16
q -2.857043455541402E-15 8.252984192424596E-15 2.061082404335067E-12 -3.757438858253217E-15 3.292363793996525E-13 1.779599338360914E-15
tp -6.889926091242405E-13 2.061082404335067E-12 9.380801558041494E-9 -1.407321053911023E-11 2.050191432877788E-9 4.768624658977496E-12
node 1.535120548411246E-15 -3.757438858253217E-15 -1.407321053911023E-11 1.457328444640703E-9 -1.452192227726603E-9 -1.979983091812078E-12
peri -1.112214238246005E-13 3.292363793996525E-13 2.050191432877788E-9 -1.452192227726603E-9 1.897810074212589E-9 2.976867287703089E-12
i -5.680327934851374E-16 1.779599338360914E-15 4.768624658977496E-12 -1.979983091812078E-12 2.976867287703089E-12 9.451041491587291E-12

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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