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74592 (1999 PR4)
Classification: Main-belt Asteroid          SPK-ID: 2074592
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1525243493746146 3.4752e-08  
a 2.234177883051792 6.7003e-09 au
q 1.893411355052164 8.0053e-08 au
i 3.402762093429699 4.1646e-06 deg
node 191.6458846487652 6.0701e-05 deg
peri 226.2976122053571 6.2476e-05 deg
M 21.43588723894762 1.4332e-05 deg
tp 2458927.870339799656
(2020-Mar-19.37033980)
4.8473e-05 TDB
period 1219.761859197359
3.34
5.4871e-06
1.502e-08
d
yr
n .2951395776851811 1.3277e-09 deg/d
Q 2.57494441105142 7.7222e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1092  
   data-arc span      7411 days (20.29 yr)  
   first obs. used      1999-08-15  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5285  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 07:26:55  

Additional Information
 Earth MOID = .90724 au 
 Jupiter MOID = 2.74742 au 
 T_jup = 3.622 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO502608  
rotation period rot_per 2.5 h n/a LCDB (Rev. 2019-August); 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:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

74592 (1999 PR4)          Discovered 1999-Aug-15 by Hug, G. at Farpoint
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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