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49 Pales (A857 SB)
Classification: Main-belt Asteroid          SPK-ID: 2000049
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 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .221379007123909 3.4913e-08  
a 3.097694333292211 7.5052e-09 au
q 2.411929837414622 1.0591e-07 au
i 3.201813336548005 3.7566e-06 deg
node 285.0550514607613 7.0247e-05 deg
peri 112.9573014057674 7.0818e-05 deg
M 312.0438800432725 9.4224e-06 deg
tp 2459265.775905657320
(2021-Feb-20.27590566)
5.2495e-05 TDB
period 1991.389756360762
5.45
7.2372e-06
1.981e-08
d
yr
n .1807782724853899 6.5699e-10 deg/d
Q 3.7834588291698 9.1666e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2873  
   data-arc span      57187 days (156.57 yr)  
   first obs. used      1863-11-20  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5153  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:06:22  

Additional Information
 Earth MOID = 1.4218 au 
 Jupiter MOID = 1.66956 au 
 T_jup = 3.182 
[ 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 7.8   n/a MPO302057  
diameter diameter 166.252 km 2.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 20.705 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F.; Benishek, V.; Klinglesmith III, D.A. (2016) Minor Planet Bull. 43, 182-183.]
[Pilcher, F. (2017) Minor Planet Bull. 44, 249-251.]
[Pilcher, F. (2018) Minor Planet Bull. 45, 356-359.]
geometric albedo albedo 0.048   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.749   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.44, mean=12.29, max.=19.60) deg.
U-B UB 0.411   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.44, mean=11.44, max.=19.60) deg.
Tholen spectral type spec_T CG   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

49 Pales (A857 SB)          Discovered 1857-Sep-19 by Goldschmidt, H. at Paris
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
1948-Dec-13 04:38 < 00:01 Jupiter 1.94433280551635 1.94433228959848 1.94433332143411 2.83000821561092 2.67164243823202 2432898.693194774 0.585142082919913 44.7192585634478 15.2394839452653 88.8227212962404 2458092.02128933 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
1958-Oct-03 10:45 < 00:01 Jupiter 1.66378020478206 1.66377983228588 1.66378057728061 1.07293204243494 0.364681735277192 2436479.947742606 0.504724057439115 3379.50510886277 481.196874095893 0.93908873660621 1562000.82642579 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
2018-Dec-14 15:34 < 00:01 Jupiter 1.68970316644945 1.6897027918683 1.6897035410307 1.50558530498773 1.12437427410967 2458467.148799195 0.242097479517973 138.947493935948 60.3512673752696 29.7920024930237 2471326.75384228 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
2028-Sep-28 06:57 < 00:01 Jupiter 1.85075604090436 1.85075560382636 1.85075647798279 1.56970688318089 1.24444917492255 2462042.789432784 0.311012561821315 88.194018194777 53.9522636775308 -54.5704471220239 2628281.04211811 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
2079-Feb-26 08:17 < 00:01 Jupiter 1.83365475106535 1.83365428122824 1.83365522090236 2.29698270546626 2.08620875200854 2480455.845197392 0.733043316882965 53.2258013512248 12.4458789669832 83.5673124916985 2459080.29778933 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
2088-Dec-15 23:17 < 00:01 Jupiter 1.69405102229578 1.6940505645427 1.6940514800478 1.10213242288051 0.46335668104321 2484036.469959727 0.83543224174224 1543.03104834181 385.474069581163 -3.87190617456316 1680602.38682951 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
2149-Feb-27 01:11 00:01 Jupiter 1.64622626179644 1.64622589927588 1.64622662431859 1.31307339093251 0.833735103250821 2506023.549102336 1.38344679717187 389.747880683571 113.350612315253 23.871373699404 2376531.34758076 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06
2158-Dec-11 18:18 00:02 Jupiter 1.95652211712925 1.95652128333673 1.95652295092266 2.02038676353151 1.79335373062634 2509598.262467134 1.49918900928213 105.315106125624 17.9264963406174 -82.5808950486812 2512032.26163861 T 83 CATAB v2.0f-lin.ifort 2020-Jun-23 15:06:46 2020-Jun-23 15:06

Alternate Designations
 A857 SB = 1947 FG = 1950 XJ = 1954 MF = 1988 VU7 = A908 AF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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