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101104 (1998 RC42)
Classification: Main-belt Asteroid          SPK-ID: 2101104
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1270468662751855 4.9929e-08  
a 2.697144920169591 1.414e-08 au
q 2.35448111017201 1.3936e-07 au
i 3.448055806167688 3.9368e-06 deg
node 242.3240218921023 7.6295e-05 deg
peri 133.4023763697487 7.8275e-05 deg
M 351.1427246391563 1.5171e-05 deg
tp 2459240.306362701954
(2021-Jan-25.80636270)
6.819e-05 TDB
period 1617.91182828693
4.43
1.2723e-05
3.483e-08
d
yr
n .2225090352304139 1.7498e-09 deg/d
Q 3.039808730167173 1.5937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      564  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-09-14  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:13  

Additional Information
 Earth MOID = 1.35605 au 
 Jupiter MOID = 2.43462 au 
 T_jup = 3.355 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457933.5 (2017-Jun-29.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1296410763934445 5.0105e-08  
q 2.346899110956778 1.4029e-07 au
tp 2457622.192870859158
(2016-Aug-21.69287086)
6.6914e-05 TDB
node 242.3801053178181 7.618e-05 deg
peri 133.4223550742074 7.8069e-05 deg
i 3.451083048596616 3.9436e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      564  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-09-14  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:13  

Additional Information
 Jupiter MOID = 2.43462 au 
 T_jup = 3.355 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.510474932959719E-15 -7.005651521682936E-15 4.097872689227068E-13 -2.574470329152072E-15 1.800806645828061E-13 -3.274184290654715E-15
q -7.005651521682936E-15 1.968248394227118E-14 -1.241513109963485E-12 6.767271532161455E-15 -5.205402677443995E-13 9.33693388795049E-15
tp 4.097872689227068E-13 -1.241513109963485E-12 4.477454078043636E-9 -2.373219708407153E-11 1.162703104336138E-9 2.245571846263296E-12
node -2.574470329152072E-15 6.767271532161455E-15 -2.373219708407153E-11 5.803425518251048E-9 -5.798865103097988E-9 -1.017884577164061E-10
peri 1.800806645828061E-13 -5.205402677443995E-13 1.162703104336138E-9 -5.798865103097988E-9 6.094769934332604E-9 1.020736124016801E-10
i -3.274184290654715E-15 9.33693388795049E-15 2.245571846263296E-12 -1.017884577164061E-10 1.020736124016801E-10 1.555232862032159E-11

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 16.11   n/a E2021B55  
diameter diameter 4.416 km 1.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.80 h n/a LCDB (Rev. 2020-October); 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.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
geometric albedo albedo 0.043   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101104 (1998 RC42)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 RC42 = 2003 YA55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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