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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2144550316804092 3.4246e-08  
a 2.153785164403632 7.5418e-09 au
q 1.691895098738656 7.5648e-08 au
i 1.731217488014181 4.2713e-06 deg
node 180.0544270827938 0.00011082 deg
peri 148.7149991129146 0.00011147 deg
M 7.820770124601597 1.6417e-05 deg
tp 2458975.418759145844
(2020-May-05.91875915)
5.2548e-05 TDB
period 1154.521429941151
3.16
6.0641e-06
1.66e-08
d
yr
n .3118175121429752 1.6378e-09 deg/d
Q 2.615675230068609 9.1592e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1518  
   data-arc span      14013 days (38.37 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56832  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:51:44  

Additional Information
 Earth MOID = .681018 au 
 Jupiter MOID = 2.73365 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-August); 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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