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JPL Small-Body Database Browser
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14544 Ericjones (1997 SG21)
Classification: Main-belt Asteroid          SPK-ID: 2014544
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09574506921223574 4.9702e-08  
a 3.054953957774093 1.863e-08 au
q 2.762457179646819 1.5616e-07 au
i 9.531279398981994 5.6118e-06 deg
node 210.2722721940868 2.6306e-05 deg
peri 182.5515793595731 3.5146e-05 deg
M 4.785201173875369 2.3489e-05 deg
tp 2458574.575933277740
(2019-Apr-01.07593328)
0.00012721 TDB
period 1950.318007728664
5.34
1.784e-05
4.884e-08
d
yr
n .184585282283916 1.6885e-09 deg/d
Q 3.347450735901367 2.0414e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1722  
   data-arc span      12105 days (33.14 yr)  
   first obs. used      1986-09-08  
   last obs. used      2019-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47552  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:49:57  

Additional Information
 Earth MOID = 1.76775 au 
 Jupiter MOID = 2.07858 au 
 T_jup = 3.208 
[ 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 12.9   n/a MPO337382  
diameter diameter 9.821 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 18.081 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.152   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

14544 Ericjones           Discovered 1997 Sept. 29 by Spacewatch at Kitt Peak.
Eric M. Jones (b. 1944) is an American astrophysicist and space historian. He incorporated the transcripts from the Apollo landings into the landmark web resource "The Apollo Lunar Surface Journal", expanding the transcripts to include annotations by the astronauts, as well as other documentation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

Alternate Designations
 1997 SG21 = 1986 RV9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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