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27039 (1998 RU61)
Classification: Main-belt Asteroid          SPK-ID: 2027039
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08295585875480935 3.9963e-08  
a 2.304612167171985 8.2689e-09 au
q 2.11343108574745 9.2288e-08 au
i 3.45532618489485 4.3924e-06 deg
node 338.2239010784893 5.245e-05 deg
peri 183.8534812315329 5.6317e-05 deg
M 163.6191275969761 2.1963e-05 deg
tp 2458019.699777021777
(2017-Sep-23.19977702)
7.6525e-05 TDB
period 1277.895092969707
3.50
6.8776e-06
1.883e-08
d
yr
n .2817132658075979 1.5162e-09 deg/d
Q 2.495793248596519 8.9548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1599  
   data-arc span      10278 days (28.14 yr)  
   first obs. used      1991-10-07  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51987  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:59:54  

Additional Information
 Earth MOID = 1.12187 au 
 Jupiter MOID = 2.48055 au 
 T_jup = 3.582 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO347724  
diameter diameter 2.760 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.38 h n/a LCDB (Rev. 2019-January); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.335   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27039 (1998 RU61)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 RU61 = 1991 TW7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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