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950 Ahrensa (A921 GG)
Classification: Main-belt Asteroid          SPK-ID: 2000950
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1579309067096668 3.1288e-08  
a 2.372268038072363 6.1446e-09 au
q 1.997613595861232 7.3703e-08 au
i 23.47301924223601 3.7736e-06 deg
node 181.7907025895827 9.2988e-06 deg
peri 348.3738350902613 1.5081e-05 deg
M 70.5500991948485 1.2269e-05 deg
tp 2458738.959354552626
(2019-Sep-12.45935455)
4.5283e-05 TDB
period 1334.578312937791
3.65
5.1852e-06
1.42e-08
d
yr
n .2697481268128331 1.048e-09 deg/d
Q 2.746922480283494 7.1151e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3309  
   data-arc span      42284 days (115.77 yr)  
   first obs. used      1904-09-11  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:23:36  

Additional Information
 Earth MOID = 1.00504 au 
 Jupiter MOID = 2.22393 au 
 T_jup = 3.417 
[ 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 11.2   n/a MPO365254  
diameter diameter 13.704 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 202. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2010) Minor Planet Bull. 37, 24-27.]
geometric albedo albedo 0.231   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sa   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)

950 Ahrensa (A921 GG)          Discovered 1921-Apr-01 by Reinmuth, K. at Heidelberg
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
2086-Dec-01 13:10 < 00:01 Inter 0.0454262307322476 0.045422109361818 0.0454303521322366 10.3904319004849 10.3904318694695 2483291.048461896 0.223897625598162 213.597145514891 27.0459169048498 -15.9673006509852 75570.5371753364 T 38 CATAB v2.0f-lin.ifort 2020-Jun-23 15:23:49 2020-Jun-23 15:23
2167-Apr-13 13:15 < 00:01 Inter 0.0367017371292827 0.0367011490733333 0.0367023255372862 10.1552526651078 10.1552526258305 2512643.051801448 0.306554389870704 415.290730234476 26.4418540343951 -88.2456799351315 207513.601472673 T 38 CATAB v2.0f-lin.ifort 2020-Jun-23 15:23:49 2020-Jun-23 15:23

Alternate Designations
 A921 GG = 1955 SU2 = 1974 VG3 = A904 RF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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