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21772 (1999 RU211)
Classification: Main-belt Asteroid          SPK-ID: 2021772
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1983902384685716 4.3678e-08  
a 3.144680772686955 1.7046e-08 au
q 2.520806804286058 1.3999e-07 au
i 11.80359448686836 5.3522e-06 deg
node 339.5901413514396 1.8241e-05 deg
peri 25.2528359780548 2.0642e-05 deg
M 338.7695200392885 1.0167e-05 deg
tp 2459516.621455673406
(2021-Oct-29.12145567)
5.7876e-05 TDB
period 2036.86982689283
5.58
1.6562e-05
4.534e-08
d
yr
n .1767417805727756 1.4371e-09 deg/d
Q 3.768554741087851 2.0428e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1562  
   data-arc span      11966 days (32.76 yr)  
   first obs. used      1988-11-03  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47415  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:18  

Additional Information
 Earth MOID = 1.52267 au 
 Jupiter MOID = 1.72374 au 
 T_jup = 3.146 
[ 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 13.20   n/a MPO636390  
diameter diameter 14.412 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 24.7406 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 0.033   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21772 (1999 RU211)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
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
1957-Aug-21 04:14 00:01 Jupiter 1.8123440774006 1.81234338809979 1.8123447668444 2.91833417629129 2.7535338065854 2436071.676294457 1.46640006579988 1845.20435860045 27.0785616098802 -89.165982170201 2792465.3637543 T 28 CATAB v2.0g-lin.ifort 2021-Aug-24 22:45:27 2021-Aug-24 22:45
1968-Apr-02 01:10 00:01 Jupiter 1.77580039508031 1.77579990899104 1.77580088118019 3.44558761900112 3.30425674625052 2439948.548284339 1.08603980161817 358.547391214513 12.6262781402361 -87.0294303217792 2763371.97274673 T 28 CATAB v2.0g-lin.ifort 2021-Aug-24 22:45:27 2021-Aug-24 22:45
2052-Sep-17 03:57 00:01 Jupiter 1.83897487061467 1.8389742883496 1.83897545289175 2.73013578099301 2.55586609831466 2470797.664681802 1.02961803824731 1249.89061842668 25.2296981662252 -89.0757665058879 2842472.61031887 T 28 CATAB v2.0g-lin.ifort 2021-Aug-24 22:45:27 2021-Aug-24 22:45
2063-Apr-23 18:35 00:01 Jupiter 1.77206042789 1.77205990878277 1.77206094701013 3.41549426340184 3.27255654108771 2474668.273968494 1.2481911995267 378.587479280452 12.5737265715442 -86.9980851717543 2539227.90035369 T 28 CATAB v2.0g-lin.ifort 2021-Aug-24 22:45:27 2021-Aug-24 22:45
2147-Oct-21 14:53 00:04 Jupiter 1.86963677332671 1.86963548921233 1.86963805764162 2.50449918672009 2.3165564424045 2505529.120426046 3.63845946774842 1272.16567435081 37.7836575812041 -85.881950616809 2714621.73960643 T 28 CATAB v2.0g-lin.ifort 2021-Aug-24 22:45:27 2021-Aug-24 22:45
2158-May-19 09:59 00:04 Jupiter 1.7721095296031 1.77210886602072 1.77211019323271 3.34616563475623 3.20013690249529 2509391.915974097 3.5662974684318 584.839080303173 13.0869370601699 -87.8020127292297 1896288.58194095 T 28 CATAB v2.0g-lin.ifort 2021-Aug-24 22:45:27 2021-Aug-24 22:45

Alternate Designations
 1999 RU211 = 1988 VB8 = 1996 EF10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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