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2001 Einstein (1973 EB)
Classification: Inner Main-belt Asteroid          SPK-ID: 2002001
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09878627161554165 4.862e-08  
a 1.933237724981914 5.4097e-09 au
q 1.742260377984439 9.4505e-08 au
i 22.68280787165845 5.6419e-06 deg
node 357.058523423745 9.1511e-06 deg
peri 217.7343183494104 2.7698e-05 deg
M 157.2266111755536 2.9331e-05 deg
tp 2458571.704842673302
(2019-Mar-29.20484267)
7.9318e-05 TDB
period 981.8074401238067
2.69
4.121e-06
1.128e-08
d
yr
n .3666706782692579 1.5391e-09 deg/d
Q 2.124215071979389 5.9441e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2245  
   data-arc span      17005 days (46.56 yr)  
   first obs. used      1973-03-05  
   last obs. used      2019-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34123  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:09:54  

Additional Information
 Earth MOID = .766499 au 
 Jupiter MOID = 2.8729 au 
 T_jup = 3.811 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456654.5 (2013-Dec-28.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09854503299440855 4.8552e-08  
q 1.742900855959739 9.4338e-08 au
tp 2456608.017026189425
(2013-Nov-11.51702619)
7.7063e-05 TDB
node 357.0904905552692 9.1517e-06 deg
peri 217.8483851976696 2.7804e-05 deg
i 22.68144466314056 5.6415e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2245  
   data-arc span      17005 days (46.56 yr)  
   first obs. used      1973-03-05  
   last obs. used      2019-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34123  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:09:54  

Additional Information
 Jupiter MOID = 2.8729 au 
 T_jup = 3.811 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.35728630944169E-15 -4.574213008720507E-15 -2.108144845717705E-12 -1.926688442395124E-14 -6.738910427826409E-13 6.029049934422757E-15
q -4.574213008720507E-15 8.899681915921053E-15 4.173197026944447E-12 3.761073834255218E-14 1.335091042125226E-12 -1.105957244460315E-14
tp -2.108144845717705E-12 4.173197026944447E-12 5.938726618734897E-9 2.427923280113162E-11 2.027936851628739E-9 8.997489989293129E-12
node -1.926688442395124E-14 3.761073834255218E-14 2.427923280113162E-11 8.375312136489498E-11 -6.835923386395276E-11 3.414213518604977E-13
peri -6.738910427826409E-13 1.335091042125226E-12 2.027936851628739E-9 -6.835923386395276E-11 7.730775877226231E-10 2.786344583982098E-12
i 6.029049934422757E-15 -1.105957244460315E-14 8.997489989293129E-12 3.414213518604977E-13 2.786344583982098E-12 3.182619015397178E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO492774  
diameter diameter 3.975 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.487 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Warner, B.D. (2008) Minor Planet Bull. 35, 163-167.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 57-64.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2013) Minor Planet Bull. 40, 71-80.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.810   0.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.720   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=24.38, mean=26.43, max.=28.49) deg.
U-B UB 0.261   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=24.38, mean=26.43, max.=28.49) deg.
Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Xe   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)

2001 Einstein (1973 EB)          Discovered 1973-Mar-05 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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