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JPL Small-Body Database Browser
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49048 (1998 RZ21)
Classification: Main-belt Asteroid          SPK-ID: 2049048
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1218914485389724 4.8628e-08  
a 2.333987339308335 9.1194e-09 au
q 2.04949424164842 1.1131e-07 au
i 5.337962908887415 5.534e-06 deg
node 356.9294541889744 4.0345e-05 deg
peri 146.7655038702251 4.38e-05 deg
M 252.708228273226 1.8272e-05 deg
tp 2459388.659381222361
(2021-Jun-23.15938122)
6.7095e-05 TDB
period 1302.405347503265
3.57
7.6332e-06
2.09e-08
d
yr
n .2764116414986522 1.62e-09 deg/d
Q 2.61848043696825 1.0231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      7752 days (21.22 yr)  
   first obs. used      1998-09-15  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54725  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:16:53  

Additional Information
 Earth MOID = 1.06381 au 
 Jupiter MOID = 2.38585 au 
 T_jup = 3.553 
[ 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 15.3   n/a MPO280005  
diameter diameter 2.569 km 0.582 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.223   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49048 (1998 RZ21)          Discovered 1998-Sep-15 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ 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
1994-Dec-26 05:56 00:01 Psych 0.0243598101176371 0.0243585534931534 0.0243610667900779 3.44832816180115 3.44832801776528 2449712.747215805 1.00229716218893 85.7680559185574 24.815098233027 45.5815653712371 108887.773807473 T 23 CATAB v2.0f-lin.ifort 2019-Dec-14 04:17:03 2019-Dec-14 04:17
2019-Dec-12 23:07 00:01 Psych 0.0285390287011738 0.0285374161879924 0.0285406412321762 3.44164378282594 3.4416436596437 2458830.462859448 1.01990061668457 88.6494605996012 25.8807049144357 26.2688757214628 84720.3464175932 T 23 CATAB v2.0f-lin.ifort 2019-Dec-14 04:17:03 2019-Dec-14 04:17
2044-Nov-30 01:06 00:02 Psych 0.0342332884717271 0.0342300466322625 0.0342365304866632 3.4895732002337 3.48957309895171 2467949.545522613 2.20105836298354 203.428193575569 26.1848632858183 37.8273730060124 121435.753119538 T 23 CATAB v2.0f-lin.ifort 2019-Dec-14 04:17:03 2019-Dec-14 04:17
2069-Dec-16 13:25 00:04 Psych 0.035413776897664 0.0354095141030192 0.0354180403812005 3.46579646134376 3.46579636276624 2477097.058811150 3.74782363729319 326.301693143403 25.2706536789197 -49.605951659094 159816.776974883 T 23 CATAB v2.0f-lin.ifort 2019-Dec-14 04:17:03 2019-Dec-14 04:17

Alternate Designations
 1998 RZ21 = 2000 CJ85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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