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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457449.5 (2016-Mar-02.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09243642778990864 1.3369e-08  
q 2.509046825803671 3.5835e-08 au
tp 2457026.425948181474
(2015-Jan-03.92594818)		 6.3619e-05 TDB
node 133.467502318086 1.6559e-05 deg
peri 181.6354338946767 2.5186e-05 deg
i 6.079255479392447 1.415e-06 deg
   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
 Jupiter MOID = 2.22016 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.787258735816791E-16 -4.631350733413536E-16 -3.82033436727033E-14 -9.601424058162667E-14 6.99116041893891E-14 -7.923763601949296E-15
q -4.631350733413536E-16 1.28412245086262E-15 1.127109160592119E-13 2.694058421468622E-13 -1.950367191595283E-13 2.213256624371012E-14
tp -3.82033436727033E-14 1.127109160592119E-13 4.047381723545335E-9 -3.769589871950054E-10 1.319899587029571E-9 -1.098771316070155E-11
node -9.601424058162667E-14 2.694058421468622E-13 -3.769589871950054E-10 2.741839537512383E-10 -3.430393500922199E-10 1.952122363219872E-11
peri 6.99116041893891E-14 -1.950367191595283E-13 1.319899587029571E-9 -3.430393500922199E-10 6.343133661620107E-10 -2.060885306873561E-11
i -7.923763601949296E-15 2.213256624371012E-14 -1.098771316070155E-11 1.952122363219872E-11 -2.060885306873561E-11 2.002200803295537E-12

[ 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

[ show close-approach data ]
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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