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18049 (1999 RX195)
Classification: Main-belt Asteroid          SPK-ID: 2018049
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09101104843478169 1.6937e-08  
a 2.539464655153064 1.009e-08 au
q 2.308345314424513 4.8135e-08 au
i 13.92164205942644 1.1341e-06 deg
node 227.2187326771644 4.0729e-06 deg
peri 269.0793175268669 1.3562e-05 deg
M 308.3961676145774 1.4774e-05 deg
tp 2459412.380574062459
(2021-Jul-16.88057406)
6.0558e-05 TDB
period 1478.126781220081
4.05
8.8098e-06
2.412e-08
d
yr
n .2435515035475153 1.4516e-09 deg/d
Q 2.770583995881616 1.1009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2419  
   data-arc span      23882 days (65.39 yr)  
   first obs. used      1955-10-25  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40965  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:21:03  

Additional Information
 Earth MOID = 1.3715 au 
 Jupiter MOID = 2.37227 au 
 T_jup = 3.400 
[ 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 12.99   n/a E2021B10  
diameter diameter 7.795 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.096077 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.158   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18049 (1999 RX195)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RX195 = 1955 UH1 = 1998 KU44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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