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21755 (1999 RE190)
Classification: Main-belt Asteroid          SPK-ID: 2021755
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2070532772026313 5.194e-08  
a 2.535833023989408 8.176e-09 au
q 2.010780485933742 1.3314e-07 au
i 7.164697260954046 2.3768e-06 deg
node 234.9845928313821 4.4218e-05 deg
peri 232.1346969136985 4.5511e-05 deg
M 51.99901126133568 1.1439e-05 deg
tp 2459183.454683205565
(2020-Nov-29.95468321)
4.7078e-05 TDB
period 1474.957161407121
4.04
7.1333e-06
1.953e-08
d
yr
n .2440748853048432 1.1804e-09 deg/d
Q 3.060885562045073 9.8689e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2296  
   data-arc span      25414 days (69.58 yr)  
   first obs. used      1951-11-28  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44164  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:02:53  

Additional Information
 Earth MOID = 1.03689 au 
 Jupiter MOID = 2.13322 au 
 T_jup = 3.407 
[ 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 13.92   n/a MPO614063  
rotation period rot_per 1.90 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:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

21755 (1999 RE190)          Discovered 1999-Sep-10 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RE190 = 1987 QV4 = 1987 SH24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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