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4342 Freud (1987 QO9)
Classification: Main-belt Asteroid          SPK-ID: 2004342
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09055035458880267 1.3477e-08  
a 2.765360683350181 1.0395e-08 au
q 2.514956292906889 3.6121e-08 au
i 6.080567907098424 1.4132e-06 deg
node 133.3611144916528 1.6546e-05 deg
peri 181.3026908907449 2.5387e-05 deg
M 106.4501434709929 1.4223e-05 deg
tp 2458703.827798834968
(2019-Aug-08.32779884)
6.5837e-05 TDB
period 1679.678266174757
4.60
9.4705e-06
2.593e-08
d
yr
n .2143267596239439 1.2084e-09 deg/d
Q 3.015765073793474 1.1336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3054  
   data-arc span      25811 days (70.67 yr)  
   first obs. used      1950-07-14  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45502  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:14:02  

Additional Information
 Earth MOID = 1.49909 au 
 Jupiter MOID = 2.22016 au 
 T_jup = 3.325 
[ 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 12.48   n/a E2020-QM5  
diameter diameter 19.180 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.051   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4342 Freud (1987 QO9)          Discovered 1987-Aug-21 by Elst, E. W. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 QO9 = 1950 NT1 = 1954 JM = 1962 EG = 1978 RA1 = 1979 YL7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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