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 ]  
19164 (1991 AU1)
Classification: Inner Main-belt Asteroid          SPK-ID: 2019164
[ 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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05454427812571432 5.948e-08  
a 1.855605461114022 5.664e-09 au
q 1.754392800751424 1.0939e-07 au
i 22.32194790460327 6.8838e-06 deg
node 334.6949407923543 9.9626e-06 deg
peri 138.8682879406392 4.9976e-05 deg
M 249.6671850125524 5.0347e-05 deg
tp 2459283.462632897369
(2021-Mar-09.96263290)		 0.0001297 TDB
period 923.2661004311547
2.53		 4.2272e-06
1.157e-08		 d
yr
n .3899200889449793 1.7853e-09 deg/d
Q 1.956818121476619 5.973e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1474  
   data-arc span      23622 days (64.67 yr)  
   first obs. used      1954-09-04  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44183  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:40:46  

Additional Information
 Earth MOID = .784302 au 
 Jupiter MOID = 3.0717 au 
 T_jup = 3.907 
[ 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 14.2   n/a MPO474018  
diameter diameter 3.368 km 0.556 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 32.492 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
geometric albedo albedo 0.316   0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

19164 (1991 AU1)          Discovered 1991-Jan-12 by Helin, E. F. at Palomar
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 AU1 = 1954 RA1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-25 22:22 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin