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JPL Small-Body Database Browser
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1916 Boreas (1953 RA)
Classification: Amor [NEO]          SPK-ID: 2001916
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 240 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4494496543880655 3.8427e-08  
a 2.273106337711848 2.9622e-09 au
q 1.251459479839937 8.7991e-08 au
i 12.87719576696079 5.106e-06 deg
node 340.6145570247544 1.3944e-05 deg
peri 335.8399312683832 1.4548e-05 deg
M 64.7046770419452 4.8623e-06 deg
tp 2458375.511029107663
(2018-Sep-14.01102911)
1.6645e-05 TDB
period 1251.780137450268
3.43
2.4469e-06
6.699e-09
d
yr
n .2875904395905168 5.6216e-10 deg/d
Q 3.294753195583759 4.2936e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1462  
   data-arc span      24173 days (66.18 yr)  
   first obs. used      1953-09-01  
   last obs. used      2019-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46825  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 20:17:35  

Additional Information
 Earth MOID = .252456 au 
 Jupiter MOID = 2.06748 au 
 T_jup = 3.440 
[ 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 14.93   n/a PDS3 (MPC 17263)  
diameter diameter 3.5 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 3.4746 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pravec, P.; Wolf, M.; Sarounova, L. (2001) http://www.asu.cas.cz/~ppravec/neo.htm]
[Krugly, Yu.N.; Belskaya, I.N.; Chiorny, V.G.; Shevchenko, V.G.; Gaflonyuk, N.M. (2002) Proc. ACM 2002, ESA SP 500, 903-906.]
[Robinson, L. (2002) Minor Planet Bull. 29, 37-38.]
B-V BV 0.852   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=12.59, mean=18.01, max.=27.67) deg.
U-B UB 0.407   0.064 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=12.59, mean=14.79, max.=19.17) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B S   n/a Binzel et al. (2004) Icarus 170, 259-294  

1916 Boreas (1953 RA)          Discovered 1953-Sep-01 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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