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JPL Small-Body Database Browser
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4924 Hiltner (1981 EQ40)
Classification: Main-belt Asteroid          SPK-ID: 2004924
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2147079606918053 3.4347e-08  
a 2.153539339567072 7.5025e-09 au
q 1.691157299699049 7.5851e-08 au
i 1.7312796695511 4.2833e-06 deg
node 180.0778057457079 0.00011209 deg
peri 148.7955521551243 0.00011276 deg
M 243.0191429205366 1.6155e-05 deg
tp 2458975.593846470715
(2020-May-06.09384647)
5.3257e-05 TDB
period 1154.323776562272
3.16
6.0322e-06
1.652e-08
d
yr
n .3118709042554138 1.6298e-09 deg/d
Q 2.615921379435096 9.1134e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1491  
   data-arc span      13970 days (38.25 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55595  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:45:57  

Additional Information
 Earth MOID = .679399 au 
 Jupiter MOID = 2.731 au 
 T_jup = 3.672 
[ 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 15.1   n/a MPO384798  
diameter diameter 2.263 km 0.248 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.9 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Binzel, R.P.; Xu, S.; Bus, S.J.; Bowell, E. (1992) Icarus 99, 225-237; Science 257, 779-782.]
geometric albedo albedo 0.236   0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4924 Hiltner (1981 EQ40)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 EQ40 = 1985 PF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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