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 ]  
955 Alstede (A921 PD)
Classification: Main-belt Asteroid          SPK-ID: 2000955
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2874935700918558 3.4804e-08  
a 2.596688846985761 8.3493e-09 au
q 1.850157499948121 8.8478e-08 au
i 10.68615092413814 4.542e-06 deg
node 351.4621355244349 1.9613e-05 deg
peri 282.5413200741154 2.093e-05 deg
M 169.76496807272 8.849e-06 deg
tp 2457879.767890008205
(2017-May-06.26789001)
3.6148e-05 TDB
period 1528.369265712718
4.18
7.3714e-06
2.018e-08
d
yr
n .2355451709715733 1.1361e-09 deg/d
Q 3.343220194023402 1.075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2483  
   data-arc span      35908 days (98.31 yr)  
   first obs. used      1921-08-06  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46795  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:14:56  

Additional Information
 Earth MOID = .869352 au 
 Jupiter MOID = 1.95743 au 
 T_jup = 3.334 
[ 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 10.8   n/a MPO384754  
diameter diameter 17.33 km 1.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 5.19 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[LeCrone, C.; Duncan, A.; Ditteon, R. (2004) Minor Planet Bull. 31, 78-80.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.]
geometric albedo albedo 0.2135   0.028 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12

955 Alstede (A921 PD)          Discovered 1921-Aug-05 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A921 PD = 1946 OF = 1955 TY = 1966 DF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-07 02:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin