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4338 Velez (1985 PB1)
Classification: Main-belt Asteroid          SPK-ID: 2004338
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1785560056092306 1.3917e-08  
a 2.251376682404155 6.3453e-09 au
q 1.849379854872307 3.1327e-08 au
i 5.838143459329114 6.3325e-07 deg
node 198.2949257477067 4.1124e-06 deg
peri 82.57494239202332 7.4918e-06 deg
M 205.3229531165381 5.3782e-06 deg
tp 2459730.644235670856
(2022-May-31.14423567)
1.9627e-05 TDB
period 1233.873601073477
3.38
5.2163e-06
1.428e-08
d
yr
n .2917640831984718 1.2335e-09 deg/d
Q 2.653373509936002 7.4783e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2441  
   data-arc span      15593 days (42.69 yr)  
   first obs. used      1978-07-05  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47563  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:13:36  

Additional Information
 Earth MOID = .842477 au 
 Jupiter MOID = 2.49306 au 
 T_jup = 3.599 
[ 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 13.81   n/a E2020-QM5  
diameter diameter 4.043 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.166 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.298   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4338 Velez (1985 PB1)          Discovered 1985-Aug-14 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1985 PB1 = 1981 GW = 1982 VQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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