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21377 (1998 CO1)
Classification: Main-belt Asteroid          SPK-ID: 2021377
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1935459352613689 5.037e-08  
a 2.564411044944121 1.3054e-08 au
q 2.068079710855827 1.3389e-07 au
i 8.60487900186506 4.9353e-06 deg
node 355.0300990886832 2.4513e-05 deg
peri 193.5717453964983 2.7665e-05 deg
M 205.604294117285 1.7041e-05 deg
tp 2459843.798593080261
(2022-Sep-21.29859308)
7.4948e-05 TDB
period 1499.960715778048
4.11
1.1453e-05
3.136e-08
d
yr
n .24000628564013 1.8326e-09 deg/d
Q 3.060742379032415 1.558e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1210  
   data-arc span      10713 days (29.33 yr)  
   first obs. used      1991-09-13  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56548  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:44:17  

Additional Information
 Earth MOID = 1.06993 au 
 Jupiter MOID = 1.90576 au 
 T_jup = 3.391 
[ 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 14.89   n/a E2021B10  
diameter diameter 3.068 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 23.3502 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 0.156   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21377 (1998 CO1)          Discovered 1998-Feb-06 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 CO1 = 2000 WQ154 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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