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74605 (1999 RL12)
Classification: Main-belt Asteroid          SPK-ID: 2074605
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1863587143291302 4.9778e-08  
a 2.30957458902407 1.0082e-08 au
q 1.879165237966316 1.1465e-07 au
i 2.485334895037101 4.0634e-06 deg
node 223.2770383219618 0.00012049 deg
peri 139.5479407150278 0.00012092 deg
M 312.7307667417301 1.3465e-05 deg
tp 2459168.834243960557
(2020-Nov-15.33424396)
4.8636e-05 TDB
period 1282.024768514694
3.51
8.3946e-06
2.298e-08
d
yr
n .2808058072209342 1.8387e-09 deg/d
Q 2.739983940081826 1.1961e-08 au
  Orbit Determination Parameters
   # obs. used (total)      839  
   data-arc span      8055 days (22.05 yr)  
   first obs. used      1998-04-01  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:06:54  

Additional Information
 Earth MOID = .877586 au 
 Jupiter MOID = 2.7229 au 
 T_jup = 3.561 
[ 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 15.7   n/a MPO324956  
rotation period rot_per 4.05 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

74605 (1999 RL12)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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