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30581 (2001 PY2)
Classification: Main-belt Asteroid          SPK-ID: 2030581
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .104957934213559 1.9498e-08  
a 2.646740704022427 1.1623e-08 au
q 2.368944267329292 5.2128e-08 au
i 9.948188416013936 9.5792e-07 deg
node 285.7098884114675 6.6814e-06 deg
peri 88.81582639585004 1.6845e-05 deg
M 138.9107356004171 1.3548e-05 deg
tp 2458593.625580490373
(2019-Apr-20.12558049)
5.7677e-05 TDB
period 1572.771104257327
4.31
1.036e-05
2.836e-08
d
yr
n .2288953548456718 1.5078e-09 deg/d
Q 2.924537140715561 1.2843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2161  
   data-arc span      16164 days (44.25 yr)  
   first obs. used      1976-12-20  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:30:29  

Additional Information
 Earth MOID = 1.39368 au 
 Jupiter MOID = 2.56378 au 
 T_jup = 3.363 
[ 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 13.56   n/a E2021B10  
diameter diameter 7.429 km 0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.973 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 0.086   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

30581 (2001 PY2)          Discovered 2001-Aug-03 by JPL/GEODSS NEAT at Haleakala
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2001 PY2 = 1976 YE7 = 1977 AQ2 = 2000 JW46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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