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4547 Massachusetts (1990 KP)
Classification: Main-belt Asteroid          SPK-ID: 2004547
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06962237618931887 5.7574e-08  
a 2.613418593024842 1.0961e-08 au
q 2.431466180601106 1.4898e-07 au
i 18.01495176961685 5.6619e-06 deg
node 358.2865663742696 1.1396e-05 deg
peri 37.35978879002663 3.3983e-05 deg
M 220.5393992875381 3.0723e-05 deg
tp 2459598.306898656479
(2022-Jan-18.80689866)
0.00013215 TDB
period 1543.163319366814
4.22
9.708e-06
2.658e-08
d
yr
n .2332870380483863 1.4676e-09 deg/d
Q 2.795371005448578 1.1724e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2174  
   data-arc span      40682 days (111.38 yr)  
   first obs. used      1909-01-29  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40016  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:10:33  

Additional Information
 Earth MOID = 1.44954 au 
 Jupiter MOID = 2.49268 au 
 T_jup = 3.336 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.7   n/a MPO337290  
diameter diameter 33.036 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.703 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
geometric albedo albedo 0.039   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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)

4547 Massachusetts (1990 KP)          Discovered 1990-May-16 by Watanabe and Endate at Sapporo
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1990 KP = 1958 TW = 1960 ED = 1962 UF = 1974 TD = 1977 FB2 = 1979 UJ2 = 1985 DC2 = 1987 SP13 = A909 BG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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