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18455 (1995 DF)
Classification: Main-belt Asteroid          SPK-ID: 2018455
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .147187046241103 4.5105e-08  
a 2.235315431613045 8.3245e-09 au
q 1.906305955816765 1.0459e-07 au
i 4.510655445652567 3.2594e-06 deg
node 116.9162527794077 4.9052e-05 deg
peri 56.04679150978693 5.0405e-05 deg
M 308.2200688537035 1.3384e-05 deg
tp 2459572.076189412713
(2021-Dec-23.57618941)
4.5975e-05 TDB
period 1220.693554226516
3.34
6.819e-06
1.867e-08
d
yr
n .294914312239579 1.6474e-09 deg/d
Q 2.564324907409326 9.5498e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      15168 days (41.53 yr)  
   first obs. used      1979-07-24  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50362  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:08:18  

Additional Information
 Earth MOID = .917031 au 
 Jupiter MOID = 2.40343 au 
 T_jup = 3.620 
[ 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 15.4   n/a MPO337414  
diameter diameter 2.588 km 0.298 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.219   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18455 (1995 DF)          Discovered 1995-Feb-20 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 DF = 1979 OC3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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