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4959 Niinoama (1991 PA1)
Classification: Main-belt Asteroid          SPK-ID: 2004959
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .009934727038515202 1.2413e-08  
a 3.147973804176281 1.4248e-08 au
q 3.116699543707394 4.0414e-08 au
i 8.998021863840956 1.0869e-06 deg
node 128.7080249559072 5.2649e-06 deg
peri 317.8009677913769 0.00014559 deg
M 344.0879905273089 0.00014281 deg
tp 2459290.671152253856
(2021-Mar-17.17115225)
0.00080916 TDB
period 2040.070103471225
5.59
1.3851e-05
3.792e-08
d
yr
n .176464524129564 1.1981e-09 deg/d
Q 3.17924806464517 1.439e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3290  
   data-arc span      25886 days (70.87 yr)  
   first obs. used      1950-05-10  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40282  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:58:27  

Additional Information
 Earth MOID = 2.13761 au 
 Jupiter MOID = 1.84883 au 
 T_jup = 3.189 
[ 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 10.98   n/a E2021B10  
diameter diameter 35.842 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.73 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Carbo, L.; Kragh, K.; Krotz, J.; Meiers, A.; et al. (2009) Minor Planet Bull. 36, 91-94.]
geometric albedo albedo 0.079   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4959 Niinoama (1991 PA1)          Discovered 1991-Aug-15 by Natori and Urata at Yakiimo
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PA1 = 1958 TZ = 1966 CB = 1968 MC = 1972 EB = 1979 OU13 = 1980 TG1 = 1980 TS8 = 1984 OO = 1985 OD = 1986 VS1 = 1989 FE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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