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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183595768003231 3.8883e-08  
a 2.270160801351795 5.8843e-09 au
q 2.001465529635114 8.8378e-08 au
i 2.310654627552338 3.6294e-06 deg
node 244.4750768779624 8.9021e-05 deg
peri 330.9997988513407 9.0185e-05 deg
M 60.64337079604599 1.312e-05 deg
tp 2458990.042605278823
(2020-May-20.54260528)
4.5712e-05 TDB
period 1249.347803479346
3.42
4.8575e-06
1.33e-08
d
yr
n .2881503445216979 1.1203e-09 deg/d
Q 2.538856073068476 6.5807e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1974  
   data-arc span      8925 days (24.44 yr)  
   first obs. used      1996-03-23  
   last obs. used      2020-08-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47581  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:15:46  

Additional Information
 Earth MOID = .993745 au 
 Jupiter MOID = 2.43077 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 14.51   n/a E2021B10  
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. 2020-October); 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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