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JPL Small-Body Database Browser
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49 Pales
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2220670204343255 3.5866e-08  
a 3.105045614871076 8.0371e-09 au
q 2.415517386863988 1.0864e-07 au
i 3.195214934385568 3.7783e-06 deg
node 285.0858073936042 7.1199e-05 deg
peri 112.2986914078243 7.1743e-05 deg
M 240.6294351215798 9.2998e-06 deg
tp 2459263.166707346280
(2021-Feb-17.66670735)
5.2859e-05 TDB
period 1998.482748972795
5.47
7.7593e-06
2.124e-08
d
yr
n .1801366562633764 6.9939e-10 deg/d
Q 3.794573842878165 9.8218e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2759  
   data-arc span      56952 days (155.93 yr)  
   first obs. used      1863-11-20  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52811  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:48:42  

Additional Information
 Earth MOID = 1.42463 au 
 Jupiter MOID = 1.65899 au 
 T_jup = 3.180 
[ 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-January); 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          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 1.94433288119406 1.94433236082764 1.94433340156037 2.83000884640113 2.67164311275993 2432898.693156606 0.588962113481669 45.3023947004599 15.3305933960859 88.7841643614504 2432778.83201483 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
1958-Oct-03 10:45 < 00:01 Jupiter 1.66378030213488 1.66377992380321 1.663780680469 1.07293292206199 0.364684404907937 2436479.947757457 0.50895180449956 3445.30005919698 488.251768099905 0.989167244856761 1533343.24985718 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
2018-Dec-14 15:34 < 00:01 Jupiter 1.68970330633457 1.68970292649483 1.68970368617441 1.50558651317088 1.12437592882729 2458467.148872206 0.245219867618684 140.762285987448 60.6728119858217 29.780677003962 2455112.91853152 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
2028-Sep-28 06:57 < 00:01 Jupiter 1.8507559930752 1.85075555198007 1.8507564341707 1.56970655831473 1.24444875564301 2462042.789538668 0.314596818722422 89.2863026000483 54.7045035557866 -54.4170660613364 2592991.63109413 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
2079-Feb-26 08:17 < 00:01 Jupiter 1.83365495131144 1.8336544802233 1.83365542239938 2.29698400885502 2.08621021126178 2480455.845330120 0.746472698839992 53.8735668311146 12.4986757688866 83.4890531327117 2454133.11040582 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
2088-Dec-15 23:17 < 00:01 Jupiter 1.69405102862717 1.69405056018488 1.6940514970682 1.1021330571569 0.463358193753322 2484036.470128177 0.848805426470344 1572.95250371865 392.450446570362 -3.70441283746314 1643370.92707942 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
2149-Feb-27 01:11 00:01 Jupiter 1.64622638901037 1.64622602158092 1.64622675644142 1.31307477767579 0.833737334960324 2506023.549345492 1.4046209674094 392.232516034237 114.055137893951 23.698713191618 2354933.67347805 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49
2158-Dec-11 18:18 00:02 Jupiter 1.95652191223979 1.95652106741057 1.95652275706991 2.02038552481125 1.79335230980768 2509598.262748684 1.51998010935712 106.544478032726 18.2289361306048 -82.4440508993186 2483847.73895256 T 80 CATAB v2.0f-lin.ifort 2019-Nov-07 01:48:59 2019-Nov-07 01:49

Alternate Designations
 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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