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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2212452658343487 1.2795e-08  
a 3.096651730571706 5.2531e-09 au
q 2.411532195244973 3.9133e-08 au
i 3.201779334091138 3.9473e-07 deg
node 285.0534422103793 6.6532e-06 deg
peri 113.0367220977662 9.0474e-06 deg
M 348.1453348283031 4.8439e-06 deg
tp 2459266.042615039134
(2021-Feb-20.54261504)
2.6788e-05 TDB
period 1990.384466566135
5.45
5.0647e-06
1.387e-08
d
yr
n .1808695787407755 4.6024e-10 deg/d
Q 3.781771265898439 6.4154e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3236  
   data-arc span      57451 days (157.29 yr)  
   first obs. used      1863-11-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:12:21  

Additional Information
 Earth MOID = 1.42039 au 
 Jupiter MOID = 1.67198 au 
 T_jup = 3.183 
[ 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 7.86   n/a E2021B10  
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. 2020-October); 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.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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 04:39 < 00:01 Jupiter 1.94433334022766 1.94433300695735 1.94433367349787 2.83001109423138 2.67164553323075 2432898.693454329 0.477770059716333 9.94858992560499 4.87554276697846 -32.0417255254384 4999342.80320279 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
1958-Oct-03 10:45 < 00:01 Jupiter 1.66378041961526 1.66378029077686 1.66378054845421 1.07293266261877 0.364683747886444 2436479.947974549 0.412657097423319 1181.12409070719 86.4983443553052 4.91457887276677 6889787.29820287 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
2018-Dec-14 15:34 < 00:01 Jupiter 1.68970353982681 1.689703307808 1.6897037718459 1.50558611001397 1.12437545305386 2458467.148723965 0.159353309508284 66.4563653286463 7.66951786163735 44.8970807388125 24141114.9204288 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
2028-Sep-28 06:57 < 00:01 Jupiter 1.85075603922492 1.85075580072509 1.85075627772485 1.56970721983634 1.24444960126645 2462042.789285154 0.219947566516349 45.1173462811494 8.31213959139738 -49.8065237614352 15721936.2164947 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
2079-Feb-26 08:16 < 00:01 Jupiter 1.83365471855694 1.83365433771619 1.83365509939759 2.29698217325975 2.08620816332977 2480455.844516084 0.535502583201928 15.5877330564915 2.7123831062324 -85.8212065392537 7863139.82086461 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
2088-Dec-15 23:16 < 00:01 Jupiter 1.69405146563594 1.69405124644632 1.69405168482565 1.10213295420341 0.463358233197016 2484036.469152702 0.622558504432538 493.67225443226 76.4134435614363 4.78212147089451 5795930.92460807 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
2149-Feb-27 01:09 00:01 Jupiter 1.64622648118166 1.64622629640906 1.64622666595548 1.31307204847153 0.833733074620525 2506023.547673845 1.05140979705473 212.833077513005 16.8353557237524 35.3617485274348 21156490.9421908 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13
2158-Dec-11 18:16 00:01 Jupiter 1.95652304162368 1.95652238584211 1.9565236974058 2.02039168006958 1.79335938498227 2509598.260939773 1.14831003892111 76.4563429421164 3.26327968833601 -79.9508144782722 9819186.14558478 T 89 CATAB v2.0f-lin.ifort 2021-Apr-12 10:13:35 2021-Apr-12 10:13

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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