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49280 (1998 UT22)
Classification: Main-belt Asteroid          SPK-ID: 2049280
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1607779832706462 4.5448e-08  
a 2.54349320753068 9.6829e-09 au
q 2.13455549916131 1.1711e-07 au
i 14.0855773240966 3.5847e-06 deg
node 70.94013594538141 2.0796e-05 deg
peri 315.6229263375416 2.4113e-05 deg
M 175.4772656588341 1.394e-05 deg
tp 2458478.291396386566
(2018-Dec-25.79139639)
5.5429e-05 TDB
period 1481.645478829851
4.06
8.4608e-06
2.316e-08
d
yr
n .2429731033123488 1.3875e-09 deg/d
Q 2.952430915900049 1.124e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1536  
   data-arc span      8174 days (22.38 yr)  
   first obs. used      1998-10-28  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49107  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:15:29  

Additional Information
 Earth MOID = 1.16279 au 
 Jupiter MOID = 2.51051 au 
 T_jup = 3.384 
[ 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 14.83   n/a E2021B10  
diameter diameter 3.580 km 0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 40.5357 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.199   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49280 (1998 UT22)          Discovered 1998-Oct-28 by Broughton, J. at Reedy Creek
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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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
1964-Nov-20 22:22 00:01 Iris 0.0493239969683907 0.0493233281639106 0.0493246658175709 5.66014562332783 5.66014560273637 2438720.432286368 1.40806372295021 356.747547206169 32.6110740590463 -88.8792414387919 226158.870545337 T 30 CATAB v2.0f-lin.ifort 2021-Apr-13 10:15:33 2021-Apr-13 10:15
1999-Mar-25 20:20 < 00:01 Eunom 0.0279528380790842 0.0279511099973021 0.0279545661828915 8.46779976230231 8.46779970299648 2451263.347381332 0.336514431094718 95.7439056953857 30.1945110928047 -27.367682720705 74528.6446429208 T 30 CATAB v2.0f-lin.ifort 2021-Apr-13 10:15:33 2021-Apr-13 10:15
2012-Sep-01 20:48 < 00:01 Hebe 0.022359323539278 0.0223582792186444 0.0223603679034898 4.41004366812744 4.41004360508166 2456172.366413310 0.696839097708747 82.8398891928159 33.6207902327922 58.3435704066879 87249.6987830077 T 30 CATAB v2.0f-lin.ifort 2021-Apr-13 10:15:33 2021-Apr-13 10:15
2122-Mar-15 01:43 00:03 Hebe 0.0146237611810719 0.0146063824095798 0.0146411409640673 4.42328889159409 4.4232887954875 2496177.571315037 2.61540874965489 887.174975991962 33.788376161963 12.4964249699768 14205.1487457735 T 30 CATAB v2.0f-lin.ifort 2021-Apr-13 10:15:33 2021-Apr-13 10:15
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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