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8201 (1994 AH2)
Classification: Apollo [NEO]          SPK-ID: 2008201
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 123 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7067970332762996 2.9283e-08  
a 2.537197099934554 5.0266e-09 au
q .7439137168635802 7.4916e-08 au
i 9.551459108151882 4.3437e-06 deg
node 164.1029368050355 4.061e-05 deg
peri 25.13038279781645 4.1064e-05 deg
M 169.3512924823287 8.7917e-06 deg
tp 2458306.090344206578
(2018-Jul-06.59034421)
3.4083e-05 TDB
period 1476.147435436417
4.04
4.3867e-06
1.201e-08
d
yr
n .2438780784072341 7.2474e-10 deg/d
Q 4.330480483005529 8.5794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      773  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      13805 days (37.80 yr)  
   first obs. used      1981-12-16  
   last obs. used      2019-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55282  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Oct-06 05:59:21  

Additional Information
 Earth MOID = .101533 au 
 Jupiter MOID = .660583 au 
 T_jup = 3.025 
[ 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 15.7   n/a MPO435777  
diameter diameter 1.859 km 0.183 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 23.949 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Sarounova, L.; Wolf, M. (1996) Icarus 124, 471-482.]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.154   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
SMASSII spectral type spec_B O   n/a Binzel et al. (2001) Icarus 151, 139-149  

8201 (1994 AH2)          Discovered 1994-Jan-05 by Garradd, G. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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