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JPL Small-Body Database Browser
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21530 Despiau (1998 MB38)
Classification: Main-belt Asteroid          SPK-ID: 2021530
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05886902866453304 3.5191e-08  
a 2.727419886656665 1.399e-08 au
q 2.566859327168856 9.9025e-08 au
i 10.75734758878316 4.9847e-06 deg
node 301.0404791103459 2.342e-05 deg
peri 320.1973898032339 5.4076e-05 deg
M 357.3172425866653 4.9539e-05 deg
tp 2459012.760419605817
(2020-Jun-12.26041961)
0.0002264 TDB
period 1645.229283928335
4.50
1.2659e-05
3.466e-08
d
yr
n .2188144859301455 1.6836e-09 deg/d
Q 2.887980446144474 1.4814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1603  
   data-arc span      17245 days (47.21 yr)  
   first obs. used      1972-11-03  
   last obs. used      2020-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47785  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:26:11  

Additional Information
 Earth MOID = 1.56002 au 
 Jupiter MOID = 2.25727 au 
 T_jup = 3.328 
[ 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 13.2   n/a MPO474048  
rotation period rot_per 3.010 h n/a LCDB (Rev. 2019-August); 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.]

21530 Despiau           Discovered 1998 June 26 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Norberto Despiau (b. 1948), staff technician and telescope operator at the Arecibo Observatory, has played a key role in numerous radar experiments on minor planets since the 1970s.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

Alternate Designations
 1998 MB38 = 1972 VD2 = 1990 XE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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