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JPL Small-Body Database Browser
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1148 Rarahu (1929 NA)
Classification: Main-belt Asteroid          SPK-ID: 2001148
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1085201838521663 3.2213e-08  
a 3.018035191350152 1.2354e-08 au
q 2.690517457512525 9.5913e-08 au
i 10.82810571569462 3.5965e-06 deg
node 145.3752917560036 2.0976e-05 deg
peri 175.4970256788066 2.8582e-05 deg
M 105.6809616161526 2.0571e-05 deg
tp 2458438.315157968073
(2018-Nov-15.81515797)
0.00010903 TDB
period 1915.07098380301
5.24
1.1759e-05
3.219e-08
d
yr
n .1879825881362895 1.1543e-09 deg/d
Q 3.345552925187778 1.3695e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2844  
   data-arc span      33018 days (90.40 yr)  
   first obs. used      1929-07-12  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4604  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:54:37  

Additional Information
 Earth MOID = 1.67805 au 
 Jupiter MOID = 1.98581 au 
 T_jup = 3.211 
[ 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 10.2   n/a MPO502164 IRAS observations used: 3
diameter diameter 27.512 km 0.371 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.5447 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.064   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.868   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.65, mean=8.27, max.=15.33) deg.
U-B UB 0.444   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=2.65, mean=4.74, max.=6.84) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B K   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1148 Rarahu (1929 NA)          Discovered 1929-Jul-05 by Deutsch, A. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1929 NA = A924 OA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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