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17730 (1998 AS4)
Classification: Main-belt Asteroid          SPK-ID: 2017730
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390819396981063 1.7173e-08  
a 2.427428640084114 7.3562e-09 au
q 2.089817156342479 4.3049e-08 au
i 11.09917230631298 4.5013e-07 deg
node 303.7880770136281 3.5283e-06 deg
peri 235.9417229078932 7.3018e-06 deg
M 334.7120263173658 8.005e-06 deg
tp 2459297.535280243759
(2021-Mar-24.03528024)
3.0831e-05 TDB
period 1381.395809967268
3.78
6.2794e-06
1.719e-08
d
yr
n .2606059736119585 1.1846e-09 deg/d
Q 2.765040123825749 8.3793e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      10430 days (28.56 yr)  
   first obs. used      1992-08-25  
   last obs. used      2021-03-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:11:13  

Additional Information
 Earth MOID = 1.11687 au 
 Jupiter MOID = 2.29155 au 
 T_jup = 3.471 
[ 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 13.04   n/a E2021B10  
diameter diameter 6.895 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.1214 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.217   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

17730 (1998 AS4)          Discovered 1998-Jan-06 by Spacewatch at Kitt Peak
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 AS4 = 1999 NR14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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