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20841 (2000 UM69)
Classification: Main-belt Asteroid          SPK-ID: 2020841
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05930587456734435 4.0413e-08  
a 3.13650940582019 2.0275e-08 au
q 2.950495972419322 1.2747e-07 au
i 7.519144663261165 4.4813e-06 deg
node 245.6106898680217 2.9141e-05 deg
peri 139.2871034969718 4.6373e-05 deg
M 239.8584408657417 3.8442e-05 deg
tp 2459877.609771400134
(2022-Oct-25.10977140)
0.00022003 TDB
period 2028.935860834359
5.55
1.9673e-05
5.386e-08
d
yr
n .1774329129615548 1.7204e-09 deg/d
Q 3.322522839221058 2.1478e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1500  
   data-arc span      15198 days (41.61 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51079  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:32:41  

Additional Information
 Earth MOID = 1.95905 au 
 Jupiter MOID = 2.04332 au 
 T_jup = 3.196 
[ 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 13.58   n/a E2021B10  
diameter diameter 10.275 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.4098 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 0.051   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20841 (2000 UM69)          Discovered 2000-Oct-25 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2000 UM69 = 1978 WT = 1998 MX48 = 1999 PJ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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