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15381 Spadolini (1997 RB1)
Classification: Main-belt Asteroid          SPK-ID: 2015381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308046161592901 3.109e-08  
a 2.283814505193205 7.7836e-09 au
q 1.985081025462389 7.2704e-08 au
i 4.578341235606697 3.2936e-06 deg
node 271.8942563078957 4.9569e-05 deg
peri 13.6823943028108 5.3511e-05 deg
M 250.5314534420323 2.3122e-05 deg
tp 2459383.833274015805
(2021-Jun-18.33327402)
8.1771e-05 TDB
period 1260.635890261079
3.45
6.4447e-06
1.764e-08
d
yr
n .2855701656450886 1.4599e-09 deg/d
Q 2.582547984924021 8.8017e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1741  
   data-arc span      11505 days (31.50 yr)  
   first obs. used      1988-12-11  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51756  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:34:02  

Additional Information
 Earth MOID = .968988 au 
 Jupiter MOID = 2.54983 au 
 T_jup = 3.588 
[ 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 14.7   n/a MPO358780  
diameter diameter 3.028 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.305   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15381 Spadolini           Discovered 1997 Sept. 1 by V. Goretti at Pianoro.
Mauro (b. 1941) and Barbara (b. 1944) Spadolini, long-standing friends of the discoverer, are dedicated secondary-school teachers who believe in cross-curricular work and in developing the human mind by arousing passion for knowledge and exploration.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1997 RB1 = 1989 EQ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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