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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 ]

[ 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 .08027122989611955 3.5603e-08  
a 2.961154980036383 1.9283e-08 au
q 2.723459427875843 1.0586e-07 au
i 11.74497744432723 4.7342e-06 deg
node 130.6157449771709 2.3221e-05 deg
peri 321.9537067370551 4.3614e-05 deg
M 79.04683864382861 3.5348e-05 deg
tp 2458591.830582570710
(2019-Apr-18.33058257)
0.00018328 TDB
period 1861.187528794746
5.10
1.818e-05
4.977e-08
d
yr
n .1934248937468037 1.8894e-09 deg/d
Q 3.198850532196922 2.0831e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1267  
   data-arc span      15957 days (43.69 yr)  
   first obs. used      1976-09-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50179  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:34:01  

Additional Information
 Earth MOID = 1.7503 au 
 Jupiter MOID = 1.9351 au 
 T_jup = 3.230 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457151.5 (2015-May-09.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08092052977234482 3.5584e-08  
q 2.722093865612401 1.0617e-07 au
tp 2456735.439413499385
(2014-Mar-18.93941350)
0.00018506 TDB
node 130.6362316163519 2.3217e-05 deg
peri 322.9480609622818 4.3311e-05 deg
i 11.74552706863044 4.7345e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1267  
   data-arc span      15957 days (43.69 yr)  
   first obs. used      1976-09-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50179  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:34:01  

Additional Information
 Jupiter MOID = 1.9351 au 
 T_jup = 3.230 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.266253649188911E-15 -3.725103114972041E-15 -1.54379257917566E-13 -8.408104351181557E-15 -4.205805072875875E-14 -3.532177612679313E-15
q -3.725103114972041E-15 1.127219777445282E-14 -3.857425417598506E-13 2.217227755942181E-14 -2.97494765845406E-14 1.098562819782163E-14
tp -1.54379257917566E-13 -3.857425417598506E-13 3.424584488624106E-8 8.290337595298078E-11 6.795463287118011E-9 4.113843183987815E-13
node -8.408104351181557E-15 2.217227755942181E-14 8.290337595298078E-11 5.390226522560648E-10 -5.107655532495894E-10 2.989067258390205E-11
peri -4.205805072875875E-14 -2.97494765845406E-14 6.795463287118011E-9 -5.107655532495894E-10 1.875859140735635E-9 -2.910471709683406E-11
i -3.532177612679313E-15 1.098562819782163E-14 4.113843183987815E-13 2.989067258390205E-11 -2.910471709683406E-11 2.241550351871461E-11

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-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.]
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

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