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2118 Flagstaff (1978 PB)
Classification: Main-belt Asteroid          SPK-ID: 2002118
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2208194245388945 4.868e-08  
a 2.546668834750058 9.9037e-09 au
q 1.984314888169413 1.2814e-07 au
i 6.300216619628005 5.6671e-06 deg
node 331.2619784031426 4.8314e-05 deg
peri 101.4052747459352 5.1597e-05 deg
M 9.67432223035841 1.9607e-05 deg
tp 2458960.608975962576
(2020-Apr-21.10897596)
8.0687e-05 TDB
period 1484.421162694784
4.06
8.6591e-06
2.371e-08
d
yr
n .2425187736790712 1.4147e-09 deg/d
Q 3.109022781330703 1.2091e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2067  
   data-arc span      32817 days (89.85 yr)  
   first obs. used      1930-12-22  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41297  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:12:26  

Additional Information
 Earth MOID = 1.01048 au 
 Jupiter MOID = 2.21268 au 
 T_jup = 3.400 
[ 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 MPO347535  
diameter diameter 11.434 km 0.205 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.17 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Vander Haagen, G.A. (2008) Minor Planet Bull. 35, 49.]
[Aznar, A.; Garceran, A.C.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 174-181.]
geometric albedo albedo 0.214   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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)

2118 Flagstaff           Discovered 1978 Aug. 5 by H. L. Giclas at the Lowell Observatory.
Named for the city of Flagstaff, Arizona, where Percival Lowell founded the Lowell Observatory in 1894. In more recent times several other astronomical facilities have been set up in Flagstaff.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5184Last Updated: 2006-03-21

Alternate Designations
 1978 PB = 1930 WF = 1946 UG = 1950 TE = 1950 TY = 1954 UK1 = 1958 RB = 1958 TA1 = 1966 QH = A907 CC = A907 CD = A915 CF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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