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4448 Phildavis (1986 EO)
Classification: Main-belt Asteroid          SPK-ID: 2004448
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 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08453175699067011 1.6237e-08  
a 2.54642213522502 1.0703e-08 au
q 2.331168598094516 4.233e-08 au
i 16.8028567842356 1.122e-06 deg
node 83.29072787297034 1.811e-06 deg
peri 47.14839693678791 1.2401e-05 deg
M 284.7581991992669 1.5461e-05 deg
tp 2459706.706367736970
(2022-May-07.20636774)
6.4742e-05 TDB
period 1484.205470853392
4.06
9.3578e-06
2.562e-08
d
yr
n .2425540176677872 1.5293e-09 deg/d
Q 2.761675672355525 1.1608e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2474  
   data-arc span      20693 days (56.65 yr)  
   first obs. used      1964-11-29  
   last obs. used      2021-07-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35803  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:24:01  

Additional Information
 Earth MOID = 1.37387 au 
 Jupiter MOID = 2.43993 au 
 T_jup = 3.378 
[ 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 11.83   n/a E2021B10  
diameter diameter 12.690 km 0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.914 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Gross, J. (2003) Minor Planet Bull. 30, 44-46.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.174   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4448 Phildavis (1986 EO)          Discovered 1986-Mar-05 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1986 EO = 1964 WH = 1972 XA2 = 1976 YB4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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