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516 Amherstia (1903 MG)
Classification: Main-belt Asteroid          SPK-ID: 2000516
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2728034653489161 3.5874e-08  
a 2.680638366886939 8.0787e-09 AU
q 1.949350931052923 9.6281e-08 AU
i 12.96119927086269 4.5353e-06 deg
node 328.8448566169879 2.0674e-05 deg
peri 258.073189782782 2.2057e-05 deg
M 251.5742827031258 1.0311e-05 deg
tp 2457483.320358081226
(2016-Apr-04.82035808)
4.692e-05 JED
period 1603.082121498241
4.39
7.2468e-06
1.984e-08
d
yr
n .2245674099736974 1.0152e-09 deg/d
Q 3.411925802720955 1.0283e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1354  
   data-arc span      40526 days (110.95 yr)  
   first obs. used      1903-11-14  
   last obs. used      2014-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57328  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 12:42:55  

Additional Information
 Earth MOID = .99111 AU 
 T_jup = 3.287 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.27 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
diameter diameter 73.10 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 7.49 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Lagerkvist, C.-I.; Hahn, G.; Magnusson, P.; Rickman, H. (1987) Astron. Astrophys. Suppl. Ser. 70, 21-32.]
[Michalowski, T.; Pych, W.; Berthier, J.; Kryszczynska, A.; et al. (2000) Astron. Astrophys. Suppl. Ser. 146, 471-479.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.1627   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV .736 mag .018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=3.91, mean=10.61, max.=27.13) deg.
U-B UB .265 mag .045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=3.91, mean=11.35, max.=27.13) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

516 Amherstia (1903 MG)          Discovered 1903-Sep-20 by Dugan, R. S. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1903 MG = 1938 YO 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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