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91215 (1999 AN)
Classification: Main-belt Asteroid          SPK-ID: 2091215
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1503622231467191 3.7473e-08  
a 2.374713396989629 7.6604e-09 au
q 2.017646211281972 9.0099e-08 au
i 2.328428246518163 4.019e-06 deg
node 17.06396113299314 9.331e-05 deg
peri 158.9271479508737 9.4195e-05 deg
M 305.3430611096284 1.2943e-05 deg
tp 2459403.435504079173
(2021-Jul-07.93550408)
4.8393e-05 TDB
period 1336.642390731692
3.66
6.4676e-06
1.771e-08
d
yr
n .2693315747699221 1.3032e-09 deg/d
Q 2.731780582697288 8.8122e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1092  
   data-arc span      8130 days (22.26 yr)  
   first obs. used      1998-12-17  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5067  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:18:22  

Additional Information
 Earth MOID = 1.02171 au 
 Jupiter MOID = 2.22885 au 
 T_jup = 3.526 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO453351  
diameter diameter 2.096 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.231   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91215 (1999 AN)          Discovered 1999-Jan-05 by Sarounova, L., Vasta, L. at Ondrejov
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 AN = 2001 TP3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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