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3725 Valsecchi (1981 EA11)
Classification: Main-belt Asteroid          SPK-ID: 2003725
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2047800189237142 6.3333e-08  
a 2.681376626138481 1.327e-08 au
q 2.132284269896238 1.6953e-07 au
i 11.40905624146724 5.8234e-06 deg
node 345.6062711657466 2.2072e-05 deg
peri 17.82973631781979 2.4323e-05 deg
M 190.8294398887525 9.5359e-06 deg
tp 2459954.128722815830
(2023-Jan-09.62872282)
4.3455e-05 TDB
period 1603.744410583532
4.39
1.1905e-05
3.259e-08
d
yr
n .2244746716648021 1.6664e-09 deg/d
Q 3.230468982380724 1.5988e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1304  
   data-arc span      16946 days (46.40 yr)  
   first obs. used      1974-09-20  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46844  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:28:21  

Additional Information
 Earth MOID = 1.13045 au 
 Jupiter MOID = 2.23818 au 
 T_jup = 3.318 
[ 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 13.94   n/a E2021B10  
diameter diameter 7.259 km 1.429 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 3.57 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:
[Angeli, C.A.; Guimaraes, T.A.; Lazzaro, D.; Duffard, R.; et al. (2001) Astron. J. 121, 2245-2252.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.111   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

3725 Valsecchi (1981 EA11)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 EA11 = 1974 SZ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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