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4397 Jalopez (1981 JS1)
Classification: Main-belt Asteroid          SPK-ID: 2004397
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .119445601524443 1.3232e-08  
a 2.3117477403783 7.0024e-09 au
q 2.035619640956042 3.0777e-08 au
i 5.469473478637349 4.635e-07 deg
node 323.2902833118735 6.2638e-06 deg
peri 208.6434690873799 9.4273e-06 deg
M 148.7971062168929 5.97e-06 deg
tp 2458669.858668541615
(2019-Jul-05.35866854)
2.1027e-05 TDB
period 1283.83464021514
3.51
5.8332e-06
1.597e-08
d
yr
n .2804099443365015 1.2741e-09 deg/d
Q 2.587875839800557 7.8388e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2361  
   data-arc span      16011 days (43.84 yr)  
   first obs. used      1977-02-13  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44166  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:18:15  

Additional Information
 Earth MOID = 1.04313 au 
 Jupiter MOID = 2.3909 au 
 T_jup = 3.568 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.91   n/a E2021B10  
diameter diameter 4.550 km 0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.282   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4397 Jalopez (1981 JS1)          Discovered 1981-May-09 by Felix Aguilar Obs. at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 JS1 = 1977 CX = 1981 KD = 1988 KM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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