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JPL Small-Body Database Browser
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15995 (1998 YQ9)
Classification: Main-belt Asteroid          SPK-ID: 2015995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1181125304027851 3.935e-08  
a 2.269428892345232 8.2423e-09 au
q 2.001380903301147 9.0229e-08 au
i 2.31120154364424 3.9308e-06 deg
node 244.4823118718059 0.00011129 deg
peri 330.9003294049655 0.00011281 deg
M 3.092396804092919 2.0743e-05 deg
tp 2458989.773303046195
(2020-May-20.27330305)
7.1928e-05 TDB
period 1248.743660017629
3.42
6.8029e-06
1.863e-08
d
yr
n .2882897519535097 1.5705e-09 deg/d
Q 2.537476881389317 9.2158e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1541  
   data-arc span      8717 days (23.87 yr)  
   first obs. used      1996-03-23  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51524  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:32:42  

Additional Information
 Earth MOID = .994742 au 
 Jupiter MOID = 2.4332 au 
 T_jup = 3.603 
[ 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 14.5   n/a MPO319284  
diameter diameter 3.585 km 0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.23 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.178   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15995 (1998 YQ9)          Discovered 1998-Dec-25 by Korlevic, K., Juric, M. at Visnjan
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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