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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 297 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4498081524325129 3.5166e-08  
a 2.272487658168402 2.9444e-09 au
q 1.250304183221985 8.0548e-08 au
i 12.88280077636658 4.5098e-06 deg
node 340.5980403406196 1.2029e-05 deg
peri 335.9037146415808 1.2537e-05 deg
M 293.5508983798024 5.0206e-06 deg
tp 2459627.460302517710
(2022-Feb-16.96030252)
1.7768e-05 TDB
period 1251.269119959073
3.43
2.4318e-06
6.658e-09
d
yr
n .287707891338176 5.5915e-10 deg/d
Q 3.294671133114818 4.2687e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1759  
   data-arc span      24753 days (67.77 yr)  
   first obs. used      1953-09-01  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46327  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-24 05:50:38  

Additional Information
 Earth MOID = .251425 au 
 Jupiter MOID = 2.07062 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 14.88   n/a MPO636091  
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. 2020-October); 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1905-Aug-25 21:49 < 00:01 Earth 0.389855176668632 0.389852823664436 0.389857529793869 6.95739783041791 6.95641542018582 2417083.409227402 0.241693384976836 372.79355101576 29.3628557602429 -72.2004073523219 1825158.51128929 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
1929-Aug-22 13:40 < 00:01 Earth 0.336026763353157 0.336025073969012 0.336028452965882 6.9479852005719 6.94684385994812 2425846.069349336 0.150719377868602 450.120680922365 12.7675416866998 -79.3342126099114 3302417.20641446 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
1953-Aug-21 10:55 < 00:01 Earth 0.31497059418386 0.314969459002696 0.314971729464301 6.97010742278988 6.96889364079328 2434610.955105776 0.0970861174946934 288.584348107835 9.63420007614896 -78.848243021823 4160339.61321202 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
1977-Aug-22 02:21 < 00:01 Earth 0.323902906793705 0.323902164188994 0.323903649434319 7.02556137948362 7.02439039086616 2443377.598190257 0.066092347566138 182.195586509599 11.1997006294904 -78.8077116589093 3600950.37019089 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2001-Aug-24 01:57 < 00:01 Earth 0.356417610975652 0.356417214138894 0.356418007812652 7.10236277940158 7.10131013293987 2452145.581241829 0.0462471290791119 67.4957901138945 19.2530574348865 -85.9421968668076 2592882.31160267 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2025-Aug-26 01:05 < 00:01 Earth 0.385315955593549 0.385315331209894 0.385316579983118 7.16081395487355 7.15984821033722 2460913.545399213 0.0605273240525364 130.728554704679 25.0786182768893 -81.7307694199547 2119773.28197831 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2049-Aug-26 19:32 < 00:01 Earth 0.393810151321756 0.393808990309302 0.39381131235776 7.19051824914969 7.18957724036945 2469680.314105982 0.107012493871512 190.576685847068 31.7401630824779 -75.0683663057686 1724802.93561154 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2073-Aug-26 22:05 < 00:01 Earth 0.393271263668858 0.393269630472722 0.393272896911849 7.22260095414389 7.22166284206589 2478446.420005274 0.149806056178096 249.343600177387 34.065870563077 -72.5732745304547 1598083.68858874 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2097-Aug-27 13:47 < 00:01 Earth 0.402923110113414 0.402921122209004 0.402925098063264 7.276788661973 7.27587984267932 2487213.074305471 0.18741332235644 253.557896293387 40.1067128206849 -68.7716495824306 1391991.5458799 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2121-Sep-01 00:58 < 00:01 Earth 0.449825235452119 0.449822971013628 0.449827499896107 7.29308736581772 7.2922751315481 2495982.540458611 0.259690153456919 149.580089853861 68.0008412800501 -47.4171730638086 868209.355349463 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2162-Aug-14 05:10 < 00:01 Earth 0.434301413773748 0.434298975139837 0.434303852410918 9.48274186570506 9.4820948691011 2510939.714946465 0.191351570423141 135.5985726089 16.9779781780719 26.4867848651256 1677731.53326722 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
2186-Aug-16 01:42 < 00:01 Earth 0.377273181189279 0.377271084777652 0.37727527760614 8.92301658093827 8.9222250571248 2519707.570536423 0.132118744367159 126.367159051299 16.1310341516743 34.5065217336639 1733167.50769725 T 297 CATAB v2.0g-lin.ifort 2021-Sep-24 05:50:42 2021-Sep-24 05:50
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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