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908 Buda (A918 WD)
Classification: Main-belt Asteroid          SPK-ID: 2000908
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1479601048209139 3.1635e-08  
a 2.473065669030839 7.4391e-09 au
q 2.107150613412033 7.9893e-08 au
i 13.41522565878865 3.717e-06 deg
node 85.5508688268941 1.9579e-05 deg
peri 23.52282975933041 2.5284e-05 deg
M 357.4051023231362 1.6306e-05 deg
tp 2459010.739285117495
(2020-Jun-10.23928512)
6.4353e-05 TDB
period 1420.534873172135
3.89
6.4095e-06
1.755e-08
d
yr
n .2534256685977019 1.1435e-09 deg/d
Q 2.838980724649645 8.5398e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2583  
   data-arc span      37224 days (101.91 yr)  
   first obs. used      1918-11-30  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:30  

Additional Information
 Earth MOID = 1.13002 au 
 Jupiter MOID = 2.33869 au 
 T_jup = 3.430 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456559.5 (2013-Sep-24.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1468890865463022 3.1657e-08  
q 2.109873954223654 7.985e-08 au
tp 2456169.219455073066
(2012-Aug-29.71945507)
6.3923e-05 TDB
node 85.60874394671274 1.9595e-05 deg
peri 23.46037115689048 2.5387e-05 deg
i 13.40865394937809 3.7151e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2583  
   data-arc span      37224 days (101.91 yr)  
   first obs. used      1918-11-30  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:30  

Additional Information
 Jupiter MOID = 2.33869 au 
 T_jup = 3.430 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.002158682391236E-15 -2.520188675288079E-15 1.502944622051153E-13 2.340902489705334E-15 4.482313312146241E-14 -1.018816827712413E-15
q -2.520188675288079E-15 6.376030402950538E-15 -3.790213011622473E-13 -4.883873065150595E-15 -1.123971122105572E-13 2.37151378096517E-15
tp 1.502944622051153E-13 -3.790213011622473E-13 4.086125668169086E-9 1.081880385089343E-11 1.057567003206496E-9 -7.946598180865143E-13
node 2.340902489705334E-15 -4.883873065150595E-15 1.081880385089343E-11 3.839817100864914E-10 -3.700278885749745E-10 -1.20058515893955E-11
peri 4.482313312146241E-14 -1.123971122105572E-13 1.057567003206496E-9 -3.700278885749745E-10 6.444798996761874E-10 1.145870139681729E-11
i -1.018816827712413E-15 2.37151378096517E-15 -7.946598180865143E-13 -1.20058515893955E-11 1.145870139681729E-11 1.38021843550098E-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 10.8   n/a MPO502161 IRAS observations used: 8
diameter diameter 30.749 km 0.492 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.572 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Oey, J.; Williams, H.; Groom, R. (2017) Minor Planet Bull. 44, 200-204.]
geometric albedo albedo 0.087   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.820   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.45 deg.
U-B UB 0.350   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.45 deg.
SMASSII spectral type spec_B L   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

908 Buda (A918 WD)          Discovered 1918-Nov-30 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
2127-Mar-17 09:37 < 00:01 Iris 0.0155012244763785 0.01549275563447 0.0155096940355016 6.76560002130365 6.76559996648849 2498005.900432296 0.980101958784264 454.062111157274 39.4563346826226 21.6617849676142 22201.0493359236 T 32 CATAB v2.0f-lin.ifort 2020-Nov-13 04:24:38 2020-Nov-13 04:24

Alternate Designations
 A918 WD = 1963 ME 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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