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JPL Small-Body Database Browser
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946 Poesia (A921 CD)
Classification: Main-belt Asteroid          SPK-ID: 2000946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1433275708945785 3.1885e-08  
a 3.11781505647056 1.1387e-08 au
q 2.670946197928092 9.9651e-08 au
i 1.431188054575848 3.384e-06 deg
node 69.66053233874653 0.00014389 deg
peri 37.93560255943876 0.00014437 deg
M 30.11915714046725 1.1516e-05 deg
tp 2458832.265808474105
(2019-Dec-14.76580847)
6.4213e-05 TDB
period 2010.823499039744
5.51
1.1016e-05
3.016e-08
d
yr
n .1790311283769638 9.8083e-10 deg/d
Q 3.564683915013029 1.302e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3331  
   data-arc span      36147 days (98.97 yr)  
   first obs. used      1921-05-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4253  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:15:59  

Additional Information
 Earth MOID = 1.68792 au 
 Jupiter MOID = 1.56142 au 
 T_jup = 3.201 
[ 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 10.6   n/a MPO502162 IRAS observations used: 15
diameter diameter 36.210 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 108.5 h n/a LCDB (Rev. 2019-August); 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:
[Stephens, R.D. (2009) Minor Planet Bull. 36, 125-126.]
geometric albedo albedo 0.097   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.667   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.76, mean=5.75, max.=20.39) deg.
U-B UB 0.336   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.76, mean=5.75, max.=20.39) deg.
Tholen spectral type spec_T FU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

946 Poesia (A921 CD)          Discovered 1921-Feb-11 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A921 CD = 1959 AA = A911 KB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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