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JPL Small-Body Database Browser
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481 Emita (A902 CB)
Classification: Main-belt Asteroid          SPK-ID: 2000481
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 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1575025374319201 3.7041e-08  
a 2.740186469632477 8.8118e-09 au
q 2.308600147628747 1.0245e-07 au
i 9.843966783518432 4.213e-06 deg
node 66.73698321468174 2.3811e-05 deg
peri 349.5535225272768 2.7179e-05 deg
M 85.4770093311367 1.28e-05 deg
tp 2458607.117151177936
5.8718e-05 TDB
period 1656.794343696767
n .2172870769203257 1.0481e-09 deg/d
Q 3.171772791636207 1.02e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3588  
   data-arc span      43092 days (117.98 yr)  
   first obs. used      1902-02-12  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42307  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:28:31  

Additional Information
 Earth MOID = 1.32152 au 
 Jupiter MOID = 2.1779 au 
 T_jup = 3.311 
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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 8.9   n/a MPO502157  
diameter diameter 101.829 km 26.738 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 14.412 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Denchev, P.; Shkodrov, V.; Ivanova, V. (1999) Abstracts of ACM 1999, 116-117.]
[Denchev, P.; Shkodrov, V.; Ivanova, V. (2000) Planet. Space Sci. 48, 983-986.]
[Behrend, R. (2007) Observatoire de Geneve web site,]
[Mansego, E.A.; Rodriguez, P.B.; de Haro, J.L.; Chiner, O.R.; et al. (2016) Minor Planet Bull. 43, 332-336.]
geometric albedo albedo 0.032   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   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)

481 Emita (A902 CB)          Discovered 1902-Feb-12 by Carnera, L. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A902 CB = 1954 NH = A899 NF = A903 HB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Mar-29 10:38 UT
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