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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310524596873247 3.1035e-08  
a 2.283988517776522 6.2694e-09 au
q 1.984666204624302 7.2411e-08 au
i 4.577890518700584 3.2757e-06 deg
node 271.8910649907675 4.1317e-05 deg
peri 13.74543391547293 4.3332e-05 deg
M 3.578703015513147 1.2851e-05 deg
tp 2459383.966785867234
(2021-Jun-18.46678587)
4.5016e-05 TDB
period 1260.77997202818
3.45
5.1911e-06
1.421e-08
d
yr
n .2855375307246342 1.1757e-09 deg/d
Q 2.583310830928742 7.091e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1958  
   data-arc span      11929 days (32.66 yr)  
   first obs. used      1988-12-11  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50027  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 21:25:29  

Additional Information
 Earth MOID = .96829 au 
 Jupiter MOID = 2.54733 au 
 T_jup = 3.588 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457282.5 (2015-Sep-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1313772164634497 3.104e-08  
q 1.983520528163212 7.2412e-08 au
tp 2456862.184733477020
(2014-Jul-23.68473348)
4.7687e-05 TDB
node 271.9643928214148 4.1321e-05 deg
peri 13.55506115544156 4.3331e-05 deg
i 4.577768659153843 3.2762e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1958  
   data-arc span      11929 days (32.66 yr)  
   first obs. used      1988-12-11  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50027  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 21:25:29  

Additional Information
 Jupiter MOID = 2.54733 au 
 T_jup = 3.588 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.634558602183924E-16 -2.241608661527121E-15 4.56357788644947E-13 -2.717192395677319E-15 1.258905911835423E-13 2.008548724676568E-16
q -2.241608661527121E-15 5.243515227609407E-15 -1.138891435905206E-12 6.383310120952527E-15 -3.110814222373848E-13 -3.9997352833075E-16
tp 4.56357788644947E-13 -1.138891435905206E-12 2.274083409826921E-9 -5.855405054216171E-12 6.319148686381411E-10 -1.197355174482521E-13
node -2.717192395677319E-15 6.383310120952527E-15 -5.855405054216171E-12 1.707398084143054E-9 -1.70335640427552E-9 2.957305638463095E-11
peri 1.258905911835423E-13 -3.110814222373848E-13 6.319148686381411E-10 -1.70335640427552E-9 1.877554976252764E-9 -2.950318930663061E-11
i 2.008548724676568E-16 -3.9997352833075E-16 -1.197355174482521E-13 2.957305638463095E-11 -2.950318930663061E-11 1.073375683111184E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.74   n/a MPO636295  
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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