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457 Alleghenia (A900 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000457
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1707692222140095 3.918e-08  
a 3.09456567004772 1.1429e-08 au
q 2.566109097483495 1.2245e-07 au
i 12.97431579982736 4.0237e-06 deg
node 249.4394171067203 1.9039e-05 deg
peri 130.6396899455886 2.2295e-05 deg
M 355.0120789678934 1.2101e-05 deg
tp 2459028.049584311487
(2020-Jun-27.54958431)
6.6873e-05 TDB
period 1988.373570530833
5.44
1.1015e-05
3.016e-08
d
yr
n .1810524970435467 1.003e-09 deg/d
Q 3.623022242611944 1.3381e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2397  
   data-arc span      43789 days (119.89 yr)  
   first obs. used      1900-09-15  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41094  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:16:33  

Additional Information
 Earth MOID = 1.59203 au 
 Jupiter MOID = 1.91943 au 
 T_jup = 3.162 
[ show covariance matrix ]

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 11.1   n/a MPO448915  
diameter diameter 18.739 km 0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 21.953 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Alvarez, E.A.; Pilcher, F. (2015) Minor Planet Bull. 42, 30.]
geometric albedo albedo 0.208   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

457 Alleghenia (A900 RA)          Discovered 1900-Sep-15 by Wolf, M. and Schwassmann, A. at Heidelberg
Discovery telegram gave only Sept. 16 observation.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A900 RA = 1938 SA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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