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912 Maritima (A919 HC)
Classification: Main-belt Asteroid          SPK-ID: 2000912
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783633332863289 4.0801e-08  
a 3.132267800901617 1.4927e-08 au
q 2.573586075187365 1.263e-07 au
i 18.29622036385508 4.7572e-06 deg
node 33.46028247002973 1.4592e-05 deg
peri 90.85797859376281 1.943e-05 deg
M 239.3908990528014 1.3913e-05 deg
tp 2460074.866410067512
(2023-May-10.36641007)
7.9459e-05 TDB
period 2024.821557464539
5.54
1.4474e-05
3.963e-08
d
yr
n .1777934448953558 1.2709e-09 deg/d
Q 3.690949526615868 1.7589e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3609  
   data-arc span      33319 days (91.22 yr)  
   first obs. used      1930-05-19  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:08:20  

Additional Information
 Earth MOID = 1.66813 au 
 Jupiter MOID = 1.70089 au 
 T_jup = 3.111 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456533.5 (2013-Aug-29.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1757090527675812 4.0016e-08  
q 2.583101090303988 1.2304e-07 au
tp 2456009.958136875485
(2012-Mar-23.45813688)
7.6494e-05 TDB
node 34.07038316460766 1.4542e-05 deg
peri 88.64343381254901 1.9837e-05 deg
i 18.34480727630836 4.759e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3609  
   data-arc span      33319 days (91.22 yr)  
   first obs. used      1930-05-19  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:08:20  

Additional Information
 Jupiter MOID = 1.70089 au 
 T_jup = 3.111 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.601245379295143E-15 -4.903201371891514E-15 2.905165777834875E-13 6.666088725264308E-16 6.139771334791058E-14 1.993521037288007E-15
q -4.903201371891514E-15 1.513964887089228E-14 -8.387773930860963E-13 9.566871071588752E-17 -1.816065795794792E-13 -8.07275455288607E-15
tp 2.905165777834875E-13 -8.387773930860963E-13 5.851282919322838E-9 -7.442787276543525E-12 1.066169844208971E-9 -2.950142834147484E-12
node 6.666088725264308E-16 9.566871071588752E-17 -7.442787276543525E-12 2.114680445953188E-10 -2.011379539236405E-10 -3.11589426877523E-12
peri 6.139771334791058E-14 -1.816065795794792E-13 1.066169844208971E-9 -2.011379539236405E-10 3.935073010016837E-10 2.140438135074785E-12
i 1.993521037288007E-15 -8.07275455288607E-15 -2.950142834147484E-12 -3.11589426877523E-12 2.140438135074785E-12 2.264833346177636E-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 9.41   n/a MPO636074  
diameter diameter 82.675 km 0.307 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 1332. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Higgins, D.; Martinez, L. (2011) Minor Planet Bull. 38, 78-79.]
geometric albedo albedo 0.039   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B C   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)

912 Maritima (A919 HC)          Discovered 1919-Apr-27 by Schwassmann, A. at Bergedorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A919 HC = 1930 GA = 1930 MO = A911 WB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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