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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1270468731892485 4.994e-08  
a 2.697144914697753 1.4166e-08 au
q 2.354481086747121 1.3938e-07 au
i 3.448055683720745 3.941e-06 deg
node 242.3240329685825 7.8276e-05 deg
peri 133.4023643595221 8.0355e-05 deg
M 351.1427261822177 1.5643e-05 deg
tp 2459240.306355645992
(2021-Jan-25.80635565)		 7.0306e-05 TDB
period 1617.911823363418
4.43		 1.2746e-05
3.49e-08		 d
yr
n .2225090359075374 1.753e-09 deg/d
Q 3.039808742648385 1.5965e-08 au
   Orbit Determination Parameters
   # obs. used (total)      560  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-09-14  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:27:07  

Additional Information
 Earth MOID = 1.35605 au 
 Jupiter MOID = 2.43462 au 
 T_jup = 3.355 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457915.5 (2017-Jun-11.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1296431572895566 5.0114e-08  
q 2.346920302702045 1.4031e-07 au
tp 2457622.209047008959
(2016-Aug-21.70904701)		 6.9098e-05 TDB
node 242.3800144474567 7.8158e-05 deg
peri 133.4272628114974 8.0141e-05 deg
i 3.451074288232903 3.9479e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      560  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-09-14  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:27:07  

Additional Information
 Jupiter MOID = 2.43462 au 
 T_jup = 3.355 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.511384424222928E-15 -7.007564939386492E-15 3.939204160411069E-13 -2.544658551931708E-15 1.757069678341876E-13 -3.283159891390457E-15
q -7.007564939386492E-15 1.968679686430905E-14 -1.211769737499151E-12 6.784962519488343E-15 -5.124288647556172E-13 9.353073599136216E-15
tp 3.939204160411069E-13 -1.211769737499151E-12 4.77452682468079E-9 -2.606640675489611E-11 1.246539474673615E-9 2.439740302513512E-12
node -2.544658551931708E-15 6.784962519488343E-15 -2.606640675489611E-11 6.10865925572805E-9 -6.104171302379703E-9 -1.049886674589178E-10
peri 1.757069678341876E-13 -5.124288647556172E-13 1.246539474673615E-9 -6.104171302379703E-9 6.422510850266443E-9 1.053211500923525E-10
i -3.283159891390457E-15 9.353073599136216E-15 2.439740302513512E-12 -1.049886674589178E-10 1.053211500923525E-10 1.55859821623346E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2110-Jul-21 20:34 < 00:01 David 0.0450555840939338 0.0450244170564086 0.0450867561057218 6.57980988630087 6.57980983534185 2491923.357171857 0.817764607379654 1723.84895145678 46.7626046219041 -25.6743540559442 62524.0076713417 T 15 CATAB v2.0f-lin.ifort 2021-Feb-24 08:27:09 2021-Feb-24 08:27

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