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33 Polyhymnia (A854 UB)
Classification: Main-belt Asteroid          SPK-ID: 2000033
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3315511478153269 2.3726e-08  
a 2.874530471110009 5.9563e-09 au
q 1.921476593983353 6.6877e-08 au
i 1.852738677568048 2.0359e-07 deg
node 8.451412793577253 1.1775e-05 deg
peri 338.4469104057212 1.205e-05 deg
M 103.3268778071995 2.1942e-06 deg
tp 2458689.572112757114
(2019-Jul-25.07211276)
9.9268e-06 TDB
period 1780.118041993361
4.87
5.5329e-06
1.515e-08
d
yr
n .2022337797311886 6.2857e-10 deg/d
Q 3.827584348236664 7.9311e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3589  
   data-arc span      60314 days (165.13 yr)  
   first obs. used      1856-01-25  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:11:04  

Additional Information
 Earth MOID = .913084 au 
 Jupiter MOID = 1.60325 au 
 T_jup = 3.212 
[ 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 8.52   n/a E2021B10  
magnitude slope G 0.33   n/a PDS3 (MPC 17257) Fit
diameter diameter 52.929 km 2.304 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 18.608 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Zappala, V.; Scaltriti, F.; Lagerkvist, C.-I.; Rickman, H.; Harris, A.W. (1982) Icarus 52, 196-201.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 25-27.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 130-131.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ferrero, A. (2012) Minor Planet Bull. 39, 138-139.]
[Pilcher, F. (2018) Minor Planet Bull. 45, 356-359.]
[Franco, L.; Pilcher, F.; Ferrero, A.; Maurice, A. (2020) Minor Planet Bull. 47, 120-122.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 34-36.]
geometric albedo albedo 0.240   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.848   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.07, mean=8.93, max.=15.71) deg.
U-B UB 0.438   0.056 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=3.07, mean=8.93, max.=15.71) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

33 Polyhymnia (A854 UB)          Discovered 1854-Oct-28 by Chacornac, J. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A854 UB = 1938 FE = 1953 AK = 1957 YL = 1963 DG = 1976 YT7 = A887 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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