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17860 Roig (1998 KQ4)
Classification: Main-belt Asteroid          SPK-ID: 2017860
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1689981797018703 4.8682e-08  
a 2.255791503711652 1.0831e-08 AU
q 1.874566845797438 1.115e-07 AU
i 4.169869398142363 5.2523e-06 deg
node 165.9764903827196 7.3545e-05 deg
peri 123.3010988356601 7.552e-05 deg
M 282.8739217348203 1.6089e-05 deg
tp 2457265.621903829326
(2015-Aug-31.12190383)
5.5387e-05 JED
period 1237.504713391448
3.39
8.9123e-06
2.44e-08
d
yr
n .2909079828984253 2.0951e-09 deg/d
Q 2.637016161625866 1.2661e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1092  
   data-arc span      8840 days (24.20 yr)  
   first obs. used      1991-04-09  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51412  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:21:48  

Additional Information
 Earth MOID = .863585 AU 
 T_jup = 3.601 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO250389  
rotation period rot_per 2.9645 h n/a LCDB (Rev. 2015-July); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

17860 Roig           Discovered 1998 May 22 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Fernando Roig (b. 1968), of the Observatório Nacional, Rio de Janeiro, is known for his results on the depletion of the Hecuba gap and as co-author of a method for computing proper elements for Jupiter Trojans.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

[ show close-approach data ]
Alternate Designations
 1998 KQ4 = 1995 SO55 = 1999 VF81 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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