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18897 (2000 HG30)
Classification: Main-belt Asteroid          SPK-ID: 2018897
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1370443121205286 1.5585e-08  
a 2.622095773439927 1.1793e-08 au
q 2.262752461854706 4.2463e-08 au
i 15.01280183138486 1.1075e-06 deg
node 101.0737625299457 1.218e-06 deg
peri 191.9745020896254 7.9577e-06 deg
M 246.7523350717406 1.1433e-05 deg
tp 2459688.363141275913
(2022-Apr-18.86314128)
5.1122e-05 TDB
period 1550.855207218513
4.25
1.0462e-05
2.864e-08
d
yr
n .2321299875864405 1.566e-09 deg/d
Q 2.981439085025146 1.3409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2558  
   data-arc span      25325 days (69.34 yr)  
   first obs. used      1951-11-08  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4284  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:41:39  

Additional Information
 Earth MOID = 1.24634 au 
 Jupiter MOID = 2.20016 au 
 T_jup = 3.343 
[ 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 12.66   n/a E2021B10  
diameter diameter 9.156 km 0.308 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 25.0282 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 0.231   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18897 (2000 HG30)          Discovered 2000-Apr-28 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 HG30 = 1978 EX3 = 1983 GY1 = 1987 HP = 1999 CW83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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