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408 Fama (A917 RB)
Classification: Main-belt Asteroid          SPK-ID: 2000408
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1449967304428996 4.1564e-08  
a 3.166308402551143 1.3636e-08 au
q 2.707204036607347 1.3389e-07 au
i 9.086256583249064 4.454e-06 deg
node 297.1321793646447 2.9857e-05 deg
peri 108.6018874818597 3.3834e-05 deg
M 33.92604816604281 1.4846e-05 deg
tp 2458806.563738006738
(2019-Nov-19.06373801)
8.488e-05 TDB
period 2057.91885856766
5.63
1.3294e-05
3.64e-08
d
yr
n .1749340108825112 1.1301e-09 deg/d
Q 3.625412768494939 1.5614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2962  
   data-arc span      41688 days (114.14 yr)  
   first obs. used      1906-09-12  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:55  

Additional Information
 Earth MOID = 1.73449 au 
 Jupiter MOID = 1.81854 au 
 T_jup = 3.168 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456410.5 (2013-Apr-28.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394391604245417 4.1225e-08  
q 2.726249318552466 1.3166e-07 au
tp 2456743.960751373498
(2014-Mar-27.46075137)
9.1948e-05 TDB
node 297.4498488298801 2.9711e-05 deg
peri 107.8625202248625 3.4177e-05 deg
i 9.107174832577304 4.4611e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2962  
   data-arc span      41688 days (114.14 yr)  
   first obs. used      1906-09-12  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:29:55  

Additional Information
 Jupiter MOID = 1.81854 au 
 T_jup = 3.168 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.699490650353054E-15 -5.406063170461654E-15 -2.538224522340047E-14 -4.913381100906762E-15 -8.927886406782833E-15 -2.035375093994065E-15
q -5.406063170461654E-15 1.733346723943255E-14 -1.177484036374723E-13 1.748932708163553E-14 -1.677317009550716E-14 7.617238411887157E-15
tp -2.538224522340047E-14 -1.177484036374723E-13 8.454347889663739E-9 -5.629063071546269E-12 1.588272344536558E-9 -3.583996950554411E-12
node -4.913381100906762E-15 1.748932708163553E-14 -5.629063071546269E-12 8.827261228502289E-10 -8.716628947077354E-10 1.335884909157586E-12
peri -8.927886406782833E-15 -1.677317009550716E-14 1.588272344536558E-9 -8.716628947077354E-10 1.168053955084776E-9 -1.884602486668283E-12
i -2.035375093994065E-15 7.617238411887157E-15 -3.583996950554411E-12 1.335884909157586E-12 -1.884602486668283E-12 1.990097369503795E-11

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 9.3   n/a MPO421629  
diameter diameter 35.620 km 0.259 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 202.1 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2008) Minor Planet Bull. 35, 21-22.]
geometric albedo albedo 0.221   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

408 Fama (A917 RB)          Discovered 1895-Oct-13 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A917 RB = 1940 TG = A895 TC = A906 RC = A908 AB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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