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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 125 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .706719874074385 2.9263e-08  
a 2.537368179604009 4.9962e-09 au
q .7441596592339123 7.4871e-08 au
i 9.550551615771587 4.3354e-06 deg
node 164.1003664432824 3.8655e-05 deg
peri 25.12385619567212 3.9097e-05 deg
M 218.1600707842351 8.8977e-06 deg
tp 2459782.160625209081
(2022-Jul-21.66062521)
3.8134e-05 TDB
period 1476.296739804038
4.04
4.3604e-06
1.194e-08
d
yr
n .2438534139469725 7.2024e-10 deg/d
Q 4.330576699974105 8.5271e-09 au
  Orbit Determination Parameters
   # obs. used (total)      780  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      14154 days (38.75 yr)  
   first obs. used      1981-12-16  
   last obs. used      2020-09-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55538  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:25:17  

Additional Information
 Earth MOID = .101504 au 
 Jupiter MOID = .659453 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. 2020-October); 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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