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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310524577851906 3.1059e-08  
a 2.283988520227017 6.5833e-09 au
q 1.984666211098106 7.2549e-08 au
i 4.577890062662289 3.2906e-06 deg
node 271.8910916113052 4.4748e-05 deg
peri 13.74541535366063 4.7115e-05 deg
M 3.578692728759278 1.5462e-05 deg
tp 2459383.966821872989
(2021-Jun-18.46682187)
5.415e-05 TDB
period 1260.77997405722
3.45
5.451e-06
1.492e-08
d
yr
n .2855375302651036 1.2345e-09 deg/d
Q 2.583310829355928 7.446e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1852  
   data-arc span      11887 days (32.54 yr)  
   first obs. used      1988-12-11  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50843  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:49:09  

Additional Information
 Earth MOID = .96829 au 
 Jupiter MOID = 2.54733 au 
 T_jup = 3.588 
[ 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 14.73   n/a E2021B10  
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

Alternate Designations
 1997 RB1 = 1989 EQ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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