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JPL Small-Body Database Browser
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15385 Dallolmo (1997 SP4)
Classification: Main-belt Asteroid          SPK-ID: 2015385
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08044332107859301 4.0719e-08  
a 2.962219129489832 2.2235e-08 au
q 2.723928384951131 1.2603e-07 au
i 11.7433601753232 4.8588e-06 deg
node 130.6151366761368 2.5855e-05 deg
peri 322.1923967745953 4.4983e-05 deg
M 1.472501181010361 3.5456e-05 deg
tp 2458592.883115832203
(2019-Apr-19.38311583)
0.00018341 TDB
period 1862.190900604651
5.10
2.0967e-05
5.74e-08
d
yr
n .1933206739884232 2.1767e-09 deg/d
Q 3.200509874028533 2.4024e-08 au
  Orbit Determination Parameters
   # obs. used (total)      930  
   data-arc span      9462 days (25.91 yr)  
   first obs. used      1994-01-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54271  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:58:23  

Additional Information
 Earth MOID = 1.75079 au 
 Jupiter MOID = 1.93426 au 
 T_jup = 3.229 
[ 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 14.1   n/a MPO492923  
diameter diameter 5.174 km 0.452 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.678 h n/a LCDB (Rev. 2019-January); 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 0.240   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15385 Dallolmo           Discovered 1997 Sept. 25 at Osservatorio San Vittore.
With degrees in both law and physics, Umberto Dall'Olmo (1925-1980) was an amateur astronomer who principally observed Jupiter and studied flare stars with Rosino. He was also interested in the history of astronomy and worked as a technician at the University of Bologna's Institute of Astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1997 SP4 = 2000 FX47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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