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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02529125604752858 4.0245e-08  
a 2.171664921422912 5.6807e-09 au
q 2.11674078784577 8.7497e-08 au
i 1.079884126614294 4.3392e-06 deg
node 169.2548702943913 0.00015693 deg
peri 352.9068791088282 0.0001687 deg
M 7.501322266801886 6.1931e-05 deg
tp 2458576.143046091100
(2019-Apr-02.64304609)
0.00020108 TDB
period 1168.927703054456
3.20
4.5866e-06
1.256e-08
d
yr
n .3079745642603091 1.2084e-09 deg/d
Q 2.226589055000056 5.8244e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2270  
   data-arc span      23431 days (64.15 yr)  
   first obs. used      1955-03-14  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45437  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 23:04:45  

Additional Information
 Earth MOID = 1.12343 au 
 Jupiter MOID = 2.73647 au 
 T_jup = 3.687 
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Orbital Elements at Epoch 2456435.5 (2013-May-23.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02532902633283429 4.033e-08  
q 2.116970520897456 8.7693e-08 au
tp 2456240.003818092544
(2012-Nov-08.50381809)
0.00019911 TDB
node 169.2692160436532 0.00015711 deg
peri 353.5975403378935 0.00016871 deg
i 1.078730625721456 4.3384e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2270  
   data-arc span      23431 days (64.15 yr)  
   first obs. used      1955-03-14  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45437  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 23:04:45  

Additional Information
 Jupiter MOID = 2.73647 au 
 T_jup = 3.687 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.626536332197541E-15 -3.529630399744624E-15 2.056872348916236E-12 -4.961780516537935E-15 6.571959000497913E-13 -4.361499045852414E-17
q -3.529630399744624E-15 7.690018487159518E-15 -4.426273001975275E-12 1.047721309893508E-14 -1.413609458773427E-12 1.153070941057919E-16
tp 2.056872348916236E-12 -4.426273001975275E-12 3.964442572570762E-8 -2.882835117793002E-12 1.224329424429103E-8 8.744062221012001E-14
node -4.961780516537935E-15 1.047721309893508E-14 -2.882835117793002E-12 2.468454925091846E-8 -2.468061819441537E-8 1.113518722774235E-10
peri 6.571959000497913E-13 -1.413609458773427E-12 1.224329424429103E-8 -2.468061819441537E-8 2.84624654835844E-8 -1.113065341065479E-10
i -4.361499045852414E-17 1.153070941057919E-16 8.744062221012001E-14 1.113518722774235E-10 -1.113065341065479E-10 1.882173550449947E-11

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-January); 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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