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19469 (1998 HV45)
Classification: Main-belt Asteroid          SPK-ID: 2019469
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627212032850803 2.1512e-08  
a 2.579681766870056 9.6311e-09 au
q 2.159912845672379 5.7509e-08 au
i 15.62704930122961 8.2932e-07 deg
node 212.0128051147121 2.6839e-06 deg
peri 163.7274950294393 4.7193e-06 deg
M 4.115093646369612 4.7519e-06 deg
tp 2459183.200846589327
(2020-Nov-29.70084659)
1.9981e-05 TDB
period 1513.378737647038
4.14
8.4752e-06
2.32e-08
d
yr
n .2378783255272362 1.3322e-09 deg/d
Q 2.999450688067733 1.1198e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2419  
   data-arc span      24182 days (66.21 yr)  
   first obs. used      1954-12-22  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38091  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:27  

Additional Information
 Earth MOID = 1.16522 au 
 Jupiter MOID = 2.47258 au 
 T_jup = 3.355 
[ 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 13.12   n/a E2021B10  
diameter diameter 7.242 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.2 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:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.233   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19469 (1998 HV45)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HV45 = 1954 WR = 1979 WQ3 = 1987 SC = 1987 UM2 = 1995 MF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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