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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08023206028056407 3.5483e-08  
a 2.960341949400641 1.7606e-08 au
q 2.722827615665246 1.0481e-07 au
i 11.74509725065811 4.1926e-06 deg
node 130.6169859096794 2.223e-05 deg
peri 321.6966439122814 3.7543e-05 deg
M 155.9408746225238 3.015e-05 deg
tp 2458590.623093134734
(2019-Apr-17.12309313)
0.00015504 TDB
period 1860.421054927135
5.09
1.6597e-05
4.544e-08
d
yr
n .1935045827645182 1.7263e-09 deg/d
Q 3.197856283136037 1.9019e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1407  
   data-arc span      16355 days (44.78 yr)  
   first obs. used      1976-09-16  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:49:09  

Additional Information
 Earth MOID = 1.74999 au 
 Jupiter MOID = 1.93637 au 
 T_jup = 3.230 
[ 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 14.13   n/a MPO614063  
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. 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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