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8721 AMOS (1996 AO3)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008721
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02809924557710692 1.892e-08  
a 3.887598536510237 2.4812e-08 au
q 3.778359950527634 7.3002e-08 au
i 5.444893101459662 1.4858e-06 deg
node 265.2495810778966 6.2173e-06 deg
peri 84.53914122345279 3.4107e-05 deg
M 214.09770356322 3.2132e-05 deg
tp 2460531.197684411820
(2024-Aug-08.69768441)
0.00025055 TDB
period 2799.7583065134
7.67
2.6804e-05
7.339e-08
d
yr
n .1285825276997984 1.231e-09 deg/d
Q 3.99683712249284 2.5509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2733  
   data-arc span      14814 days (40.56 yr)  
   first obs. used      1981-01-08  
   last obs. used      2021-07-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45059  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 12:32:45  

Additional Information
 Earth MOID = 2.77645 au 
 Jupiter MOID = 1.20309 au 
 T_jup = 3.059 
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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 11.49   n/a MPO636198  
diameter diameter 49.91 km 3.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 29.131 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.0235   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5

8721 AMOS           Discovered 1996 Jan. 14 by AMOS at Haleakala.
Named for the Air Force Maui Optical Station (AMOS), the research and development arm of the Maui Space Surveillance System at Haleakala on Maui, Hawaii. The AMOS project for observations of minor planets is the result of a collaboration between the Air Force Research Laboratory and Eleanor Helin's observing programs at the Jet Propulsion Laboratory. This collaboration began in 1993 and continues today. AMOS performs follow-up observations for several programs, primarily the highly successful JPL NEAT program.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1996 AO3 = 1979 YO1 = 1981 AU1 = 1986 RA11 = 1986 RQ17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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