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1863 Antinous (1948 EA)
Classification: Apollo [NEO]          SPK-ID: 2001863
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 200 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6063724027515934 2.6662e-08  
a 2.258645821289091 1.5844e-09 au
q .8890653276691789 6.0184e-08 au
i 18.39925248724597 5.4722e-06 deg
node 346.4341231003507 1.14e-05 deg
peri 268.0826997811582 1.1693e-05 deg
M 127.8864631908113 3.3516e-06 deg
tp 2458760.053965189088
(2019-Oct-03.55396519)
1.1353e-05 TDB
period 1239.854231447077
3.39
1.3046e-06
3.572e-09
d
yr
n .2903567136112699 3.0552e-10 deg/d
Q 3.628226314909003 2.5452e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1048  
   data-arc span      26615 days (72.87 yr)  
   first obs. used      1948-03-05  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48774  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:03:02  

Additional Information
 Earth MOID = .18278 au 
 Jupiter MOID = 2.01938 au 
 T_jup = 3.298 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457299.5 (2015-Oct-04.0) TDB
Reference: JPL 200 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .606321522090843 2.6664e-08  
q .889586955780325 6.0218e-08 au
tp 2457519.561534484931
(2016-May-11.06153448)
1.0899e-05 TDB
node 346.489997550445 1.1396e-05 deg
peri 267.9980658445074 1.1691e-05 deg
i 18.40009525390754 5.4722e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1048  
   data-arc span      26615 days (72.87 yr)  
   first obs. used      1948-03-05  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48774  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:03:02  

Additional Information
 Jupiter MOID = 2.01938 au 
 T_jup = 3.298 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.109845326207469E-16 -1.605589994002698E-15 -1.215609038397345E-13 1.66016424227231E-15 -3.469119103878714E-14 -4.195742731226202E-15
q -1.605589994002698E-15 3.626245575788167E-15 2.771023295851021E-13 -3.819976746982154E-15 7.861298857625447E-14 1.049023080628902E-14
tp -1.215609038397345E-13 2.771023295851021E-13 1.187776205320111E-10 4.728742399592213E-12 3.437638765477465E-11 3.220027030628334E-12
node 1.66016424227231E-15 -3.819976746982154E-15 4.728742399592213E-12 1.298741156752367E-10 -1.207668912091837E-10 3.077967920288097E-12
peri -3.469119103878714E-14 7.861298857625447E-14 3.437638765477465E-11 -1.207668912091837E-10 1.366809865491598E-10 -1.638181968316825E-12
i -4.195742731226202E-15 1.049023080628902E-14 3.220027030628334E-12 3.077967920288097E-12 -1.638181968316825E-12 2.994482118002847E-11

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 15.40   n/a E2021B10  
diameter diameter 2.1 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 7.453 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1999) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D. (2016) Minor Planet Bull. 43, 240-250.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.]
[Warner, B.D.; Pravec, P.; Kusnirak, P.; Benishek, V.; Ferrero, A. (2017) Minor Planet Bull. 44, 206-212.]
geometric albedo albedo 0.24   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV 0.763   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=21.71, mean=22.67, max.=23.62) deg.
U-B UB 0.359   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=21.71, mean=22.67, max.=23.62) deg.
Tholen spectral type spec_T SU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sq   n/a Binzel et al. (2001) Icarus 151, 139-149  

1863 Antinous (1948 EA)          Discovered 1948-Mar-07 by Wirtanen, C. A. at Mount Hamilton
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
1907-Oct-11 06:15 < 00:01 Mars 0.0894322999735626 0.0894276930030489 0.0894369069765862 18.0795360919673 18.0793590294489 2417859.760448485 0.360457743783826 245.004619883053 12.4412918635628 20.3649464235318 375579.415480306 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1914-Mar-29 02:55 < 00:01 Earth 0.216801787933039 0.216798503906287 0.216805072029655 19.8211173532386 19.8204973011746 2420220.621338978 0.329080944742253 254.337807343359 11.9253657453478 49.9946432924895 1993621.14491716 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1931-Apr-06 05:10 < 00:01 Earth 0.174222023802769 0.174221435097441 0.174222612552652 15.6406740162095 15.6396961770757 2426437.715201461 0.230120924502465 153.964401256557 11.5572271735244 -79.8741729768625 2238385.59773761 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1948-Apr-05 23:14 < 00:01 Earth 0.176868395093946 0.17686793096243 0.176868859238764 15.3983357140764 15.3973573463118 2432647.468365239 0.138074101075419 91.333891254707 11.5881218733319 -77.2215850309277 2259067.47635453 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1965-Feb-02 06:30 < 00:01 Mars 0.0984644562023214 0.0984641376496525 0.0984647747551693 16.2935275443056 16.2933490953686 2438793.770742255 0.0826199008458496 42.8158716320624 15.6628233478972 86.191022956764 936120.343220148 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1965-Apr-06 03:08 < 00:01 Earth 0.179654662404362 0.179654322478292 0.179655002333088 15.3032326748061 15.3022634948241 2438856.630504738 0.0837195871779138 50.0483412096301 11.5557837274456 -75.2437329829849 2297248.29593387 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1982-Apr-05 22:46 < 00:01 Earth 0.182027986170155 0.182027723367592 0.182028248973048 15.4520182366088 15.4510709044215 2445065.448451530 0.0623044265792048 28.8256963157219 11.5411478171383 -76.4041901863017 2342543.93370524 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
1999-Apr-01 14:44 < 00:01 Earth 0.18940942166516 0.189409180769765 0.189409662560577 17.8563631636097 17.8555753429793 2451270.114115082 0.049419645474427 18.3951935405353 11.699061999359 78.9307232983555 2340715.55353148 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2016-Mar-27 11:19 < 00:01 Earth 0.23717704149693 0.237176740262603 0.237177342731365 20.2354300502476 20.2348748709943 2457474.971428055 0.0449235155895862 19.9219394474413 11.7994706257213 54.6127398082293 2565536.2641569 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2033-Mar-23 16:37 < 00:01 Earth 0.30633430670236 0.306333783815697 0.306334829589388 22.6518720686482 22.6514880818431 2463680.192118555 0.0489640307109561 32.0491665939229 11.791374462424 38.7073715842451 2551376.51208851 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2043-Aug-24 20:36 < 00:01 Earth 0.360031297392582 0.360030465558102 0.360032129227471 24.2545560032771 24.2542508756693 2467486.358242433 0.0583691894454636 45.9170766314558 11.5104287020455 26.2968283264704 2189419.74961104 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2050-Mar-17 21:01 < 00:01 Earth 0.429653215994742 0.429652310727347 0.429654121262553 26.4321526647536 26.4319180454813 2469883.375827870 0.065203802431212 50.2736352159654 11.7495697811233 26.9168860062498 2582990.61853469 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2060-Aug-19 18:18 < 00:01 Earth 0.277291361135325 0.277290301282419 0.27729242099039 21.6938349534096 21.6933920142073 2473691.262674214 0.0838288542519801 66.0543233202716 11.5128886321216 37.5315209565607 2123244.14197961 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2077-Aug-17 02:41 < 00:01 Earth 0.234611609644136 0.234610479420333 0.234612739873699 20.1511878996247 20.1506243031365 2479897.611504368 0.104838616633882 81.7620279232645 11.555012951233 47.0393902285689 2123861.71996352 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2094-Aug-13 08:54 < 00:01 Earth 0.193127313340807 0.193126537405157 0.193128089290706 18.0439440064797 18.0431793851849 2486102.870748503 0.128334643842614 94.8716697562137 11.470407513122 66.8980325180028 2225728.07335442 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2111-Aug-16 02:17 < 00:01 Earth 0.203638135504361 0.203636812907983 0.20363945812169 18.8827237383117 18.8820307968079 2492313.595342933 0.163328504679189 123.707936678381 11.6822281780199 58.1943437018832 2117975.10461228 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2128-Aug-22 00:22 < 00:01 Earth 0.306177812055369 0.306175015228074 0.306180608892862 22.6619725109516 22.6615884991135 2498529.515062084 0.205874340654762 165.143588307305 11.9708582487583 32.4768633792946 1943682.12975261 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2135-Mar-18 01:17 < 00:01 Earth 0.47275848100997 0.47275520808187 0.472761753942719 27.3355227192986 27.3353165389436 2500928.553537554 0.211072264600271 179.180956468049 11.2148804371576 24.428290365759 2479893.1638553 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2145-Aug-28 19:43 < 00:01 Earth 0.441508972551783 0.441505522169312 0.441512422938017 26.6634479856331 26.6632216471731 2504745.321707966 0.228597137802539 183.768405299808 12.0877506974054 20.6137165475797 1833533.69950651 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2152-Mar-28 11:54 < 00:01 Earth 0.285884056542221 0.285881353699306 0.28588675941619 20.6973765501304 20.696926239868 2507148.995622181 0.24459930502257 200.956332013977 10.7808049057837 47.9719005521848 2788592.6228433 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2169-Apr-07 18:18 < 00:01 Earth 0.225733484106892 0.225733048914756 0.225733919360504 15.1149582583032 15.1141773129603 2513368.262370945 0.303953646462158 211.224381560684 10.1428082398441 -84.7798917759044 3290051.97499924 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
2186-Jul-23 19:33 00:01 Earth 0.280473437884031 0.280469513561254 0.280477362207333 10.9653988976232 10.9645325078019 2519684.314837089 1.16651173974183 196.637769117572 9.00490996834368 -5.5686952862109 827620.370092437 T 200 CATAB v2.0f-lin.ifort 2021-Apr-12 13:03:14 2021-Apr-12 13:03
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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