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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783633343307325 4.1411e-08  
a 3.132267801591225 1.5229e-08 au
q 2.573586072482621 1.2783e-07 au
i 18.29622086407871 4.7999e-06 deg
node 33.46028410722464 1.474e-05 deg
peri 90.85797663021648 1.9607e-05 deg
M 239.390899255723 1.3917e-05 deg
tp 2460074.866409150205
(2023-May-10.36640915)
7.9469e-05 TDB
period 2024.821558133223
5.54
1.4767e-05
4.043e-08
d
yr
n .1777934448366406 1.2967e-09 deg/d
Q 3.690949530699829 1.7946e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3533  
   data-arc span      33277 days (91.11 yr)  
   first obs. used      1930-05-19  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32612  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:42:54  

Additional Information
 Earth MOID = 1.66813 au 
 Jupiter MOID = 1.70089 au 
 T_jup = 3.111 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456465.5 (2013-Jun-22.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1756993745431127 4.0671e-08  
q 2.58296177443345 1.2475e-07 au
tp 2456009.874384138429
(2012-Mar-23.37438414)
7.6718e-05 TDB
node 34.07107926075265 1.4686e-05 deg
peri 88.62169892621132 2.0008e-05 deg
i 18.34560168904654 4.8027e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3533  
   data-arc span      33277 days (91.11 yr)  
   first obs. used      1930-05-19  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .32612  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:42:54  

Additional Information
 Jupiter MOID = 1.70089 au 
 T_jup = 3.111 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.654168152482257E-15 -5.052798487766005E-15 2.489467257055031E-13 7.837630657019676E-16 5.073921312586231E-14 1.762139585617685E-15
q -5.052798487766005E-15 1.556213457449502E-14 -7.206859921186724E-13 -2.782166120039359E-16 -1.512664941891131E-13 -7.395000001402045E-15
tp 2.489467257055031E-13 -7.206859921186724E-13 5.885648912529882E-9 -9.594859282841529E-12 1.07694381151474E-9 -3.389414382175658E-12
node 7.837630657019676E-16 -2.782166120039359E-16 -9.594859282841529E-12 2.156749503746816E-10 -2.055607157502885E-10 -1.796296450277762E-12
peri 5.073921312586231E-14 -1.512664941891131E-13 1.07694381151474E-9 -2.055607157502885E-10 4.003280664674585E-10 8.119546533147597E-13
i 1.762139585617685E-15 -7.395000001402045E-15 -3.389414382175658E-12 -1.796296450277762E-12 8.119546533147597E-13 2.306592373024361E-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 9.42   n/a E2021B10  
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

[ show close-approach data ]
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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