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101908 (1999 RG4)
Classification: Main-belt Asteroid          SPK-ID: 2101908
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17516033559325 8.2478e-08  
a 3.169741650445438 3.51e-08 au
q 2.614528639209513 2.7353e-07 au
i 16.27241510688619 9.0936e-06 deg
node 307.620572090472 2.09e-05 deg
peri 54.11160912257427 2.9372e-05 deg
M 215.7866317808308 2.4318e-05 deg
tp 2459826.228446058608
(2022-Sep-03.72844606)
0.00014834 TDB
period 2061.266887056772
5.64
3.4238e-05
9.374e-08
d
yr
n .1746498729788623 2.901e-09 deg/d
Q 3.724954661681363 4.1248e-08 au
  Orbit Determination Parameters
   # obs. used (total)      447  
   data-arc span      7624 days (20.87 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57206  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:50  

Additional Information
 Earth MOID = 1.64577 au 
 Jupiter MOID = 1.84374 au 
 T_jup = 3.117 
[ 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 14.50   n/a E2021B55  
diameter diameter 7.330 km 0.424 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101908 (1999 RG4)          Discovered 1999-Sep-05 by CSS at Catalina
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1968-Jan-23 09:11 00:02 Jupiter 1.87121051762393 1.87120957019987 1.87121146504863 4.58629460993619 4.48651065542598 2439878.882684184 2.15982775420626 398.01834199651 46.3017697915708 -88.9794852294934 1678425.94238491 T 17 CATAB v2.0f-lin.ifort 2020-Nov-12 19:57:51 2020-Nov-12 19:57
1979-Feb-07 13:37 00:02 Jupiter 1.88048256340195 1.88048161016499 1.88048351665217 5.00837685844664 4.91761956719955 2443912.067366523 1.56954715285615 340.356233493579 28.2902415734713 -83.9689129760845 1995580.02614393 T 17 CATAB v2.0f-lin.ifort 2020-Nov-12 19:57:51 2020-Nov-12 19:57
2098-Oct-19 01:56 00:04 Jupiter 1.92685627683426 1.9268544874467 1.92685806622357 4.33877686227144 4.23624940911944 2487630.580724191 4.18496408738906 378.163119476944 92.5675732098625 86.7792606130139 1528085.97332712 T 17 CATAB v2.0f-lin.ifort 2020-Nov-12 19:57:51 2020-Nov-12 19:57
2109-Oct-31 00:37 00:05 Jupiter 1.87583393487247 1.87583312911718 1.87583474064707 4.94809455430338 4.8559809202081 2491659.525644440 4.67250118913637 649.272072220713 34.3162308386189 -88.5062056060585 1977066.57202625 T 17 CATAB v2.0f-lin.ifort 2020-Nov-12 19:57:51 2020-Nov-12 19:57

Alternate Designations
 1999 RG4 = 2002 AU164 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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