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JPL Small-Body Database Browser
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1881 Shao (1940 PC)
Classification: Main-belt Asteroid          SPK-ID: 2001881
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1047594961728299 3.2161e-08  
a 3.166006425858287 1.5617e-08 au
q 2.834337187805431 1.0246e-07 au
i 9.868943647392948 4.241e-06 deg
node 218.0558348073602 2.2237e-05 deg
peri 66.66047398286008 3.0712e-05 deg
M 24.16767145325766 2.0732e-05 deg
tp 2458462.366688813391
(2018-Dec-09.86668881)
0.0001184 TDB
period 2057.62446429137
5.63
1.5225e-05
4.168e-08
d
yr
n .1749590395368774 1.2945e-09 deg/d
Q 3.497675663911143 1.7253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2399  
   data-arc span      28873 days (79.05 yr)  
   first obs. used      1940-08-03  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46995  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:20:55  

Additional Information
 Earth MOID = 1.83634 au 
 Jupiter MOID = 1.65629 au 
 T_jup = 3.172 
[ 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 11.4   n/a MPO267714  
diameter diameter 24.083 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.452 h n/a LCDB (Rev. 2019-January); 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:
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.111   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1881 Shao (1940 PC)          Discovered 1940-Aug-03 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1940 PC = 1968 OO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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