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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1181125313965242 3.8912e-08  
a 2.269428892213427 5.9064e-09 au
q 2.001380900929689 8.8442e-08 au
i 2.311197535828594 3.6322e-06 deg
node 244.4821419288442 8.9342e-05 deg
peri 330.9004989257867 9.052e-05 deg
M 3.092397152344323 1.3255e-05 deg
tp 2458989.773301839139
(2020-May-20.27330184)
4.5986e-05 TDB
period 1248.743659908841
3.42
4.875e-06
1.335e-08
d
yr
n .2882897519786249 1.1255e-09 deg/d
Q 2.537476883497164 6.604e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1954  
   data-arc span      8897 days (24.36 yr)  
   first obs. used      1996-03-23  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47511  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:03:08  

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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