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3375 Amy (1981 JY1)
Classification: Main-belt Asteroid          SPK-ID: 2003375
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02556383479209346 3.559e-08  
a 2.172584643003455 5.0452e-09 au
q 2.117045048117875 7.6206e-08 au
i 1.079973138208383 3.6553e-06 deg
node 169.2200425924499 0.00013147 deg
peri 354.0643916440035 0.00014164 deg
M 129.5124800885908 5.3959e-05 deg
tp 2458579.703029849771
(2019-Apr-06.20302985)
0.00017484 TDB
period 1169.670360342574
3.20
4.0744e-06
1.116e-08
d
yr
n .3077790223688003 1.0721e-09 deg/d
Q 2.228124237889034 5.1742e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2775  
   data-arc span      23971 days (65.63 yr)  
   first obs. used      1955-03-14  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44266  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:50  

Additional Information
 Earth MOID = 1.12299 au 
 Jupiter MOID = 2.73322 au 
 T_jup = 3.687 
[ 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 14.0   n/a MPO365286  
diameter diameter 6.721 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.255633 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.125   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3375 Amy (1981 JY1)          Discovered 1981-May-05 by Shoemaker, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 JY1 = 1955 EE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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