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1473 Ounas (1938 UT)
Classification: Main-belt Asteroid          SPK-ID: 2001473
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2374158531435964 2.94e-08  
a 2.573888414640368 8.107e-09 au
q 1.962806500782106 7.9253e-08 au
i 13.6456397081665 5.8063e-07 deg
node 216.4780412509653 1.5782e-06 deg
peri 129.1480061594113 2.8598e-06 deg
M 41.0941804141171 5.823e-06 deg
tp 2459224.328674900012
(2021-Jan-09.82867490)
2.3809e-05 TDB
period 1508.283567439222
4.13
7.126e-06
1.951e-08
d
yr
n .2386819082112068 1.1277e-09 deg/d
Q 3.184970328498629 1.0032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2863  
   data-arc span      29984 days (82.09 yr)  
   first obs. used      1938-12-13  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40703  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:30:26  

Additional Information
 Earth MOID = .98731 au 
 Jupiter MOID = 2.39789 au 
 T_jup = 3.349 
[ 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 11.82   n/a E2021B10  
diameter diameter 18.164 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 139.1 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F.; Benishek, V.; Ferrero, A. (2013) Minor Planet Bull. 40, 126-129.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.110   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1473 Ounas (1938 UT)          Discovered 1938-Oct-22 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 UT = 1950 NZ = 1950 PB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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