Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
1863 Antinous (1948 EA)
Classification: Apollo [NEO]          SPK-ID: 2001863
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-06 07:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin