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101897 (1999 PO4)
Classification: Main-belt Asteroid          SPK-ID: 2101897
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3015586217485072 7.4038e-08  
a 2.568089984876842 1.25e-08 au
q 1.793660308511237 1.8324e-07 au
i 19.15484302307605 4.5121e-06 deg
node 348.9758012144333 1.6201e-05 deg
peri 20.80313179718628 1.9445e-05 deg
M 52.41319487777939 1.3231e-05 deg
tp 2458981.647296899821
(2020-May-12.14729690)
5.4163e-05 TDB
period 1503.189670078025
4.12
1.0975e-05
3.005e-08
d
yr
n .2394907357108926 1.7485e-09 deg/d
Q 3.342519661242447 1.6269e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1059  
   data-arc span      7872 days (21.55 yr)  
   first obs. used      1999-08-15  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:15  

Additional Information
 Earth MOID = .799458 au 
 Jupiter MOID = 2.16406 au 
 T_jup = 3.292 
[ 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 14.90   n/a E2021B55  
diameter diameter 6.487 km 0.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.39254 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.067   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101897 (1999 PO4)          Discovered 1999-Aug-15 by Broughton, J. at Reedy Creek
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 PO4 = 2001 DO15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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