Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
457 Alleghenia (A900 RA)
Classification: Main-belt Asteroid          SPK-ID: 2000457
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1709699867060357 4.0705e-08  
a 3.097001888138768 1.2485e-08 au
q 2.567507516495116 1.2778e-07 au
i 12.97503188256509 4.0824e-06 deg
node 249.4459112353083 1.9482e-05 deg
peri 130.3748099938115 2.2942e-05 deg
M 282.8609625286012 1.2993e-05 deg
tp 2459027.062179558451
(2020-Jun-26.56217956)
7.2716e-05 TDB
period 1990.722073735747
5.45
1.2038e-05
3.296e-08
d
yr
n .1808389050132104 1.0935e-09 deg/d
Q 3.62649625978242 1.4619e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2322  
   data-arc span      43547 days (119.23 yr)  
   first obs. used      1900-09-15  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41756  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:43:15  

Additional Information
 Earth MOID = 1.59286 au 
 Jupiter MOID = 1.91623 au 
 T_jup = 3.162 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.1   n/a MPO448915  
diameter diameter 18.739 km 0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 21.953 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Alvarez, E.A.; Pilcher, F. (2015) Minor Planet Bull. 42, 30.]
geometric albedo albedo 0.208   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

457 Alleghenia (A900 RA)          Discovered 1900-Sep-15 by Wolf, M. and Schwassmann, A. at Heidelberg
Discovery telegram gave only Sept. 16 observation.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A900 RA = 1938 SA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-19 07:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin