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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2143984895473275 2.7755e-08  
a 2.153803459986076 4.4727e-09 au
q 1.692031251383254 5.8591e-08 au
i 1.731188415778925 3.5198e-06 deg
node 180.0535115317649 0.00010322 deg
peri 148.7384125304784 0.00010374 deg
M 70.17147804490106 1.1937e-05 deg
tp 2458975.456923732732
(2020-May-05.95692373)
3.7945e-05 TDB
period 1154.536140800348
3.16
3.5963e-06
9.846e-09
d
yr
n .3118135390291383 9.7129e-10 deg/d
Q 2.615575668588898 5.4316e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2022  
   data-arc span      14652 days (40.11 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:56:47  

Additional Information
 Earth MOID = .679225 au 
 Jupiter MOID = 2.73382 au 
 T_jup = 3.672 
[ 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 15.11   n/a E2021B10  
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. 2020-October); 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

Alternate Designations
 1981 EQ40 = 1985 PF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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