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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1607779828069023 4.6071e-08  
a 2.543493210153634 9.7076e-09 au
q 2.13455550254208 1.1859e-07 au
i 14.08557726818791 3.5908e-06 deg
node 70.94013442020439 2.1132e-05 deg
peri 315.6229276371549 2.4542e-05 deg
M 175.4772656438004 1.4108e-05 deg
tp 2458478.291395331283
(2018-Dec-25.79139533)
5.6172e-05 TDB
period 1481.645481121752
4.06
8.4824e-06
2.322e-08
d
yr
n .2429731029365031 1.391e-09 deg/d
Q 2.952430917765188 1.1268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      8102 days (22.18 yr)  
   first obs. used      1998-10-28  
   last obs. used      2021-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:20:56  

Additional Information
 Earth MOID = 1.16279 au 
 Jupiter MOID = 2.51051 au 
 T_jup = 3.384 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456954.5 (2014-Oct-24.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1591394131656361 4.6076e-08  
q 2.139588194676424 1.1851e-07 au
tp 2456992.914896106238
(2014-Dec-01.41489611)
5.3994e-05 TDB
node 71.08069076121114 2.1159e-05 deg
peri 315.0071365693597 2.4652e-05 deg
i 14.07283180596108 3.5863e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      8102 days (22.18 yr)  
   first obs. used      1998-10-28  
   last obs. used      2021-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:20:56  

Additional Information
 Jupiter MOID = 2.51051 au 
 T_jup = 3.384 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.122954726803049E-15 -5.447831674652918E-15 -1.114942400260436E-12 -2.727535750423195E-14 -2.904479088907676E-13 -1.578488144995531E-15
q -5.447831674652918E-15 1.404570582581531E-14 2.970523133621275E-12 7.267010597839252E-14 7.676685221002369E-13 4.344142401268746E-15
tp -1.114942400260436E-12 2.970523133621275E-12 2.915335256408675E-9 3.313436613054929E-11 7.211096361046756E-10 -8.240136743511238E-13
node -2.727535750423195E-14 7.267010597839252E-14 3.313436613054929E-11 4.477045851011985E-10 -4.252793671032245E-10 -1.437237819069233E-11
peri -2.904479088907676E-13 7.676685221002369E-13 7.211096361046756E-10 -4.252793671032245E-10 6.077297173158245E-10 1.376881467781532E-11
i -1.578488144995531E-15 4.344142401268746E-15 -8.240136743511238E-13 -1.437237819069233E-11 1.376881467781532E-11 1.286138184115496E-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 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

[ 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
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 29 CATAB v2.0f-lin.ifort 2021-Feb-24 19:21:00 2021-Feb-24 19:21
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 29 CATAB v2.0f-lin.ifort 2021-Feb-24 19:21:00 2021-Feb-24 19:21
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 29 CATAB v2.0f-lin.ifort 2021-Feb-24 19:21:00 2021-Feb-24 19:21
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 29 CATAB v2.0f-lin.ifort 2021-Feb-24 19:21:00 2021-Feb-24 19:21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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