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18867 (1999 RX223)
Classification: Main-belt Asteroid          SPK-ID: 2018867
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1287829748992121 1.545e-08  
a 2.705551306539167 1.0915e-08 au
q 2.357122360540603 3.9933e-08 au
i 12.19842736983061 9.5337e-07 deg
node 225.7280479013523 3.1337e-06 deg
peri 309.8757938100722 7.9559e-06 deg
M 98.88253027673522 6.7858e-06 deg
tp 2458754.022931386176
(2019-Sep-27.52293139)
2.9713e-05 TDB
period 1625.481713009856
4.45
9.8365e-06
2.693e-08
d
yr
n .221472808410375 1.3402e-09 deg/d
Q 3.053980252537732 1.2321e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1936  
   data-arc span      10545 days (28.87 yr)  
   first obs. used      1991-12-03  
   last obs. used      2020-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46043  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:04:17  

Additional Information
 Earth MOID = 1.37852 au 
 Jupiter MOID = 1.99014 au 
 T_jup = 3.321 
[ 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 13.40   n/a E2021B10  
diameter diameter 5.516 km 0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 67.5982 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.231   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18867 (1999 RX223)          Discovered 1999-Sep-07 by CSS at Catalina
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RX223 = 1998 MQ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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