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5535 Annefrank (1942 EM)
Classification: Main-belt Asteroid          SPK-ID: 2005535
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 120 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06418031676429288 2.708e-08  
a 2.212628302404174 3.5328e-09 au
q 2.070621117074234 6.0876e-08 au
i 4.248462898624452 2.9026e-06 deg
node 120.6076619457635 3.0289e-05 deg
peri 8.850569566581861 3.5984e-05 deg
M 22.67450185133474 1.9608e-05 deg
tp 2459124.782480929109
(2020-Oct-02.28248093)
6.5485e-05 TDB
period 1202.156812274854
3.29
2.8791e-06
7.883e-09
d
yr
n .2994617643257108 7.172e-10 deg/d
Q 2.354635487734113 3.7595e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2401  
   data-arc span      28791 days (78.83 yr)  
   first obs. used      1942-03-23  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:25:24  

Additional Information
 Earth MOID = 1.08549 au 
 Jupiter MOID = 2.65656 au 
 T_jup = 3.650 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.81   n/a E2021B10  
diameter diameter 4.8 km n/a T.C. Duxbury et al. (2003) JGR v.109, E02002 sphere having a volume equal to that of the fit tri-axial ellipsoid
extent extent 6.6 x 5.0 x 3.4 km n/a T.C. Duxbury et al. (2003) JGR v.109, E02002 from best fit of Stardust spacecraft images
rotation period rot_per 15.12 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:
[Schmidt, B.E.; Bauer, J.; Buratti, J.; Russell, C.T. (2007) Lunar & Planetary Sci. XXXVIII, 1859.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.311   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

5535 Annefrank (1942 EM)          Discovered 1942-Mar-23 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 EM = 1978 EK6 = 1986 TV14 = 1991 BO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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