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4954 Eric (1990 SQ)
Classification: Amor [NEO]          SPK-ID: 2004954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 495 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4493837521094419 3.0604e-08  
a 2.000855357655871 4.2732e-09 au
q 1.101703469604197 6.0996e-08 au
i 17.42943968217795 5.676e-06 deg
node 358.4436101524564 1.0444e-05 deg
peri 52.58954692714843 1.1564e-05 deg
M 150.9533899079657 7.1615e-06 deg
tp 2458567.026713888605
(2019-Mar-24.52671389)
1.9364e-05 TDB
period 1033.765343694793
2.83
3.3117e-06
9.067e-09
d
yr
n .3482415058656541 1.1156e-09 deg/d
Q 2.900007245707546 6.1936e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2832  
   data-arc span      16507 days (45.19 yr)  
   first obs. used      1975-06-07  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40429  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-18 06:07:23  

Additional Information
 Earth MOID = .194663 au 
 Jupiter MOID = 2.70097 au 
 T_jup = 3.658 
[ 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 12.5   n/a MPO416765  
diameter diameter 10.8 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 12.056 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Krugly, Yu.N.; Shevchenko, V.G. (1994) Abstracts of Small Bodies Conf.; Mariehamn, p. 86.]
[Pravec, P.; Wolf, M.; Varady, M.; Barta, P. (1995) Earth, Moon, and Planets 71, 177-187.]
[Zeigler, K.W.; Monsees, R.D.; Brown, L. (1998) Minor Planet Bull. 25, 13-14.]
[Warner, B.D (2011) Minor Planet Bull. 38, 25-31.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 157-168.]
geometric albedo albedo 0.176   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B S   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)

4954 Eric (1990 SQ)          Discovered 1990-Sep-23 by Roman, B. at Palomar
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
1908-Oct-02 18:11 < 00:01 Earth 0.33113267017644 0.331129044990163 0.33113629538216 15.319985242067 15.3194600000946 2418217.257706243 0.203027476439179 220.848246324764 13.0031824875444 -35.1337423316141 1927449.72112619 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
1925-Sep-29 11:36 < 00:01 Earth 0.423913375178303 0.42390979155141 0.423916958812401 17.6390131897145 17.6386568490882 2424422.983358244 0.206830344012696 198.928841647719 13.2641479937347 -26.1276748859741 1868296.40700853 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
1939-Oct-06 06:38 < 00:01 Mars 0.0704731943921767 0.0704725904601027 0.0704737984179816 12.526845337209 12.5265210378163 2429542.776480150 0.335763923202941 143.566429033946 12.2847886170091 -78.915959603041 836703.424320387 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
1973-Oct-05 14:41 < 00:01 Earth 0.423313951627388 0.423312289803626 0.423315613465324 9.06122394449931 9.06052927287665 2441961.111635860 0.164377313179979 155.131368964846 30.172471637354 59.5222946648157 1727700.17885508 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
1990-Oct-10 04:03 < 00:01 Earth 0.333967758561568 0.333966946037283 0.333968571097586 9.05600253818811 9.05512150472175 2448174.668481695 0.0598465029744063 111.864647773991 13.0402368316852 69.8007812027919 3104644.52571118 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2007-Oct-11 11:45 < 00:01 Earth 0.286507060625645 0.286506770038077 0.286507351213735 9.1257213832583 9.12470224272756 2454384.989563561 0.0399454150240959 30.092211020918 9.95970560508161 68.2439066424073 3815696.91821046 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2024-Oct-11 05:00 < 00:01 Earth 0.242534596815017 0.242533860260863 0.242535333378214 9.38867428365699 9.38750407999699 2460594.708451640 0.0368372214120364 84.6835722894294 9.28106287488081 65.0254075605829 3647014.07354897 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2041-Oct-11 05:16 < 00:01 Earth 0.210956312988167 0.210955365267391 0.21095726074041 9.83078898713654 9.82950411521706 2466803.719387875 0.0506100061372592 139.484433780828 9.63571128575484 70.5772685627524 2966087.74401658 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2058-Oct-11 08:27 < 00:01 Earth 0.206645340588106 0.206644117117926 0.206646564144858 9.96159613978901 9.960301687563 2473012.851747269 0.0705235508713984 222.259841325693 9.84758511426392 74.2632909111689 2824696.18877635 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2075-Oct-11 18:54 < 00:01 Earth 0.21274838526503 0.212746124810113 0.212750645941315 9.80102590775828 9.79974799013041 2479222.287643108 0.0822397300997149 361.530943854387 9.67217039092198 71.8923822744393 2953292.71309714 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2092-Oct-11 04:41 < 00:01 Earth 0.217861490849317 0.217857514597959 0.217865467616914 9.67224390634462 9.67097936499091 2485431.695029478 0.10690201788476 565.397671067942 9.56755471895904 69.4885536304471 3088265.494275 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2109-Oct-12 15:44 < 00:01 Earth 0.227289477884721 0.227282773813972 0.227296183082887 9.51592172002973 9.51468972124539 2491641.155883341 0.0997063036039528 865.77477404065 9.46339746213791 67.2898134012666 3283960.37733068 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2126-Oct-12 19:47 < 00:01 Earth 0.265434605381168 0.265422120567473 0.265447092923023 9.11520596259713 9.11410463996173 2497850.324484277 0.185853591955119 1479.52250951484 9.4955372713711 65.1139559629976 3879181.15177806 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2143-Oct-11 18:39 < 00:01 Earth 0.327870440551007 0.327851129596091 0.327889758089745 8.86486369440449 8.86394692420576 2504058.276902954 0.909858805776706 2509.32491003333 12.0233004968991 67.4309047418709 3370365.9923948 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2160-Oct-08 10:41 00:02 Earth 0.391932936175772 0.391908978050125 0.391956899927954 8.81133365421853 8.81056207954438 2510264.945130114 1.95609248398312 2629.3680160506 22.3469004005669 62.9764645380935 2151465.12983496 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2169-Mar-24 15:45 00:03 Mars 0.0629556258747779 0.062941415344286 0.0629698429168962 12.2251083808112 12.2247363957233 2513354.156089975 2.82937942567953 1233.73654002352 12.7321284608045 -54.9392916300853 604407.941056407 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
2177-Oct-04 00:58 00:03 Earth 0.458804496219265 0.458779180188248 0.458829813473642 8.78701025897484 8.7863493222385 2516469.540060996 2.89326750020689 1729.41565698336 38.8770216247954 43.1288140473606 1213467.93870128 T 495 CATAB v2.0f-lin.ifort 2020-Aug-18 06:07:48 2020-Aug-18 06:07
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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