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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05462924360979893 2.5694e-08  
a 1.855756530425615 4.261e-09 au
q 1.754377954844519 4.8172e-08 au
i 22.32184972946245 8.4738e-07 deg
node 334.6938754759833 3.7696e-06 deg
peri 138.8074419507961 1.5078e-05 deg
M 327.716099201803 1.4718e-05 deg
tp 2459283.306308931211
(2021-Mar-09.80630893)
3.7751e-05 TDB
period 923.3788507026057
2.53
3.1802e-06
8.707e-09
d
yr
n .3898724772893308 1.3428e-09 deg/d
Q 1.957135106006711 4.4937e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2098  
   data-arc span      24295 days (66.52 yr)  
   first obs. used      1954-09-04  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40061  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:47:13  

Additional Information
 Earth MOID = .784227 au 
 Jupiter MOID = 3.07077 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 14.22   n/a E2021B10  
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. 2020-October); 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 ]
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