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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1479061067550767 1.5234e-08  
a 2.472446569055034 6.5121e-09 au
q 2.106756622866157 3.8848e-08 au
i 13.41506883136675 6.059e-07 deg
node 85.5446026752022 2.7407e-06 deg
peri 23.41513875384321 5.4976e-06 deg
M 97.88122984326321 6.165e-06 deg
tp 2459010.412522212695
(2020-Jun-09.91252221)
2.3877e-05 TDB
period 1420.001487782657
3.89
5.6101e-06
1.536e-08
d
yr
n .2535208611380702 1.0016e-09 deg/d
Q 2.838136515243911 7.4753e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3186  
   data-arc span      37465 days (102.57 yr)  
   first obs. used      1918-11-30  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37203  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:42:46  

Additional Information
 Earth MOID = 1.1298 au 
 Jupiter MOID = 2.33979 au 
 T_jup = 3.431 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457021.5 (2014-Dec-30.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1467855361662519 1.5209e-08  
q 2.110555887292342 3.875e-08 au
tp 2457590.633490695244
(2016-Jul-21.13349070)
2.3288e-05 TDB
node 85.60631104276681 2.7426e-06 deg
peri 23.57364546537907 5.533e-06 deg
i 13.40697873707946 6.0567e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3186  
   data-arc span      37465 days (102.57 yr)  
   first obs. used      1918-11-30  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37203  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:42:46  

Additional Information
 Jupiter MOID = 2.33979 au 
 T_jup = 3.431 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.313228249273331E-16 -5.833976725812867E-16 -2.136653019506837E-13 -2.072346908019225E-15 -3.053201606453902E-14 -4.449346051482693E-16
q -5.833976725812867E-16 1.501564273986473E-15 5.30055119586753E-13 4.962228842827415E-15 7.303095441939043E-14 1.054222053171302E-15
tp -2.136653019506837E-13 5.30055119586753E-13 5.423413270755716E-10 4.013657360135021E-12 1.108125975734069E-10 -1.066792439415859E-12
node -2.072346908019225E-15 4.962228842827415E-15 4.013657360135021E-12 7.521987340352378E-12 -6.057519651441673E-12 1.416774120779348E-12
peri -3.053201606453902E-14 7.303095441939043E-14 1.108125975734069E-10 -6.057519651441673E-12 3.061369320885327E-11 -1.613903848283631E-12
i -4.449346051482693E-16 1.054222053171302E-15 -1.066792439415859E-12 1.416774120779348E-12 -1.613903848283631E-12 3.668350842341336E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.81   n/a MPO614063 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. 2020-October); 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

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