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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 ]

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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09878626899966605 4.7626e-08  
a 1.933237725309111 5.343e-09 au
q 1.742260383336423 9.2906e-08 au
i 22.68280975379066 5.2308e-06 deg
node 357.0585219907933 9.0123e-06 deg
peri 217.7343225149588 2.7089e-05 deg
M 157.226608025292 2.9166e-05 deg
tp 2458571.704851155971
(2019-Mar-29.20485116)
7.8747e-05 TDB
period 981.8074403730604
2.69
4.0702e-06
1.114e-08
d
yr
n .3666706781761703 1.5201e-09 deg/d
Q 2.124215067281799 5.8708e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2505  
   data-arc span      17422 days (47.70 yr)  
   first obs. used      1973-03-05  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32565  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:03:52  

Additional Information
 Earth MOID = .766499 au 
 Jupiter MOID = 2.8729 au 
 T_jup = 3.811 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456914.5 (2014-Sep-14.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09865023707529694 4.756e-08  
q 1.742794382398482 9.2775e-08 au
tp 2456608.036851518945
(2013-Nov-11.53685152)
7.5817e-05 TDB
node 357.0855518822187 9.012e-06 deg
peri 217.8549766041469 2.717e-05 deg
i 22.68220003376206 5.2305e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2505  
   data-arc span      17422 days (47.70 yr)  
   first obs. used      1973-03-05  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32565  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:03:52  

Additional Information
 Jupiter MOID = 2.8729 au 
 T_jup = 3.811 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.261913494756568E-15 -4.406524310355641E-15 -1.975450312459548E-12 -1.6323301558462E-14 -6.213153047184302E-13 4.306876516199068E-15
q -4.406524310355641E-15 8.60723414028017E-15 3.945259856302015E-12 3.207527562436812E-14 1.243648359085778E-12 -7.789597050090885E-15
tp -1.975450312459548E-12 3.945259856302015E-12 5.748149897108771E-9 2.131274767644355E-11 1.947957910756749E-9 1.055447556154611E-11
node -1.6323301558462E-14 3.207527562436812E-14 2.131274767644355E-11 8.121614394131578E-11 -6.717667796038849E-11 3.388920459272191E-12
peri -6.213153047184302E-13 1.243648359085778E-12 1.947957910756749E-9 -6.717667796038849E-11 7.382190098664999E-10 5.829165178641544E-13
i 4.306876516199068E-15 -7.789597050090885E-15 1.055447556154611E-11 3.388920459272191E-12 5.829165178641544E-13 2.735836238912812E-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. 2020-October); 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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