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2131 Mayall (1975 RA)
Classification: Inner Main-belt Asteroid          SPK-ID: 2002131
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1109839253637639 7.6672e-08  
a 1.887302356286584 5.7989e-09 au
q 1.677842132437618 1.4476e-07 au
i 33.99323812205083 8.1779e-06 deg
node 306.0321958231583 8.2253e-06 deg
peri 38.52996231140172 2.6525e-05 deg
M 98.25305226837642 2.2992e-05 deg
tp 2458742.033536806173
(2019-Sep-15.53353681)
6.0667e-05 TDB
period 947.0232690137606
2.59
4.3647e-06
1.195e-08
d
yr
n .3801384947752209 1.752e-09 deg/d
Q 2.09676258013555 6.4425e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2401  
   data-arc span      16491 days (45.15 yr)  
   first obs. used      1975-09-03  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .30086  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:12:20  

Additional Information
 Earth MOID = .694564 au 
 Jupiter MOID = 3.24641 au 
 T_jup = 3.750 
[ 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 12.7   n/a MPO502173 IRAS observations used: 3
diameter diameter 8.252 km 0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.5678 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 54-58.]
[Warner, B.D.; Stephens, R.D.; Higgins, D.; Pravec, P. (2007) Minor Planet Bull. 34, 23.]
[Warner, B.D.; Pravec, P.; Kusnirak, P.; Hornoch, K.; Harris, A.W.; et al. (2010) Minor Planet Bull. 37, 70-73.]
[Warner, B.D.; Pravec, P.; Kusnirak, P.; Hornoch, K; et al. (2010) CBET 2105.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D. (2015) Minor Planet Bull. 42, 60-66.]
[Pravec, P.; Scheirich, P.; Kusnirak, P.; Hornoch, K.; et al. (2016) Icarus 267, 267-295.]
geometric albedo albedo 0.244   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.871   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.13, mean=21.80, max.=32.47) deg.
U-B UB 0.450   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.13, mean=21.80, max.=32.47) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

2131 Mayall           Discovered 1975 Sept. 3 by A. R. Klemola at the Lick Observatory.
Named in honor of Nicholas U. Mayall, director of the Kitt Peak National Observatory during 1960-1971. It was under his direction that the planning and construction of a major portion of the astronomical facilities at the Kitt Peak and Cerro Tololo observatories were accomplished. He was on the Lick Observatory staff from 1945 to 1960. His major research contribution spans the domains of nebular spectroscopy, radial velocities of globular clusters and planetary nebulae, and the redshifts and internal motions of galaxies.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5848Last Updated: 2006-03-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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