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

Significant website upgrade scheduled for September 27. More details available here.

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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1710804749832011 1.3094e-08  
a 3.096010429306861 9.7359e-09 au
q 2.566343494508099 3.8488e-08 au
i 12.97196983404414 7.2318e-07 deg
node 249.4393072663319 3.3859e-06 deg
peri 130.7307224231855 7.9328e-06 deg
M 66.59510860770142 5.8179e-06 deg
tp 2459028.420288278270
(2020-Jun-27.92028828)
3.1925e-05 TDB
period 1989.766200403774
5.45
9.3857e-06
2.57e-08
d
yr
n .1809257790824605 8.5343e-10 deg/d
Q 3.625677364105623 1.1402e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2990  
   data-arc span      44054 days (120.61 yr)  
   first obs. used      1900-09-15  
   last obs. used      2021-04-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:06:01  

Additional Information
 Earth MOID = 1.59153 au 
 Jupiter MOID = 1.91866 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 11.17   n/a E2021B10  
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. 2020-October); 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 2021-Sep-21 16:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin