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181895 (1999 RM155)
Classification: Main-belt Asteroid          SPK-ID: 2181895
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173826921414172 4.6085e-08  
a 2.195692055695537 1.2251e-08 au
q 1.814021665280427 1.035e-07 au
i 3.004873420297166 4.6484e-06 deg
node 262.8858925063387 0.00011052 deg
peri 57.75392408221474 0.000112 deg
M 211.1966518759247 2.3308e-05 deg
tp 2459691.708388779460
(2022-Apr-22.20838878)
7.9803e-05 TDB
period 1188.380652652768
3.25
9.9458e-06
2.723e-08
d
yr
n .3029332387702446 2.5353e-09 deg/d
Q 2.577362446110647 1.438e-08 au
  Orbit Determination Parameters
   # obs. used (total)      281  
   data-arc span      7895 days (21.62 yr)  
   first obs. used      1999-09-05  
   last obs. used      2021-04-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59146  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:09:53  

Additional Information
 Earth MOID = .801338 au 
 Jupiter MOID = 2.71903 au 
 T_jup = 3.647 
[ 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 17.06   n/a MPCxxxxx  
rotation period rot_per 2.711 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

181895 (1999 RM155)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1999 RM155 = 1999 RA255 = 2006 XC14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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