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181899 (1999 RM178)
Classification: Main-belt Asteroid          SPK-ID: 2181899
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1707447748372538 7.1243e-08  
a 2.252707321450071 1.1866e-08 au
q 1.868069317074845 1.5742e-07 au
i 6.649471728752784 6.4439e-06 deg
node 153.0031468452657 4.0999e-05 deg
peri 196.1964183268161 4.3222e-05 deg
M 105.5463671673287 1.6905e-05 deg
tp 2458838.426807191133
(2019-Dec-20.92680719)
5.6461e-05 TDB
period 1234.967653643128
3.38
9.758e-06
2.672e-08
d
yr
n .2915056106433296 2.3033e-09 deg/d
Q 2.637345325825296 1.3893e-08 au
  Orbit Determination Parameters
   # obs. used (total)      386  
   data-arc span      8370 days (22.92 yr)  
   first obs. used      1998-03-22  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56047  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:31  

Additional Information
 Earth MOID = .860578 au 
 Jupiter MOID = 2.78022 au 
 T_jup = 3.598 
[ 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 16.75   n/a MPCxxxxx  
rotation period rot_per 3.72 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

181899 (1999 RM178)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

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