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2744 Birgitta (1975 RB)
Classification: Mars-crossing Asteroid          SPK-ID: 2002744
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .332614690972071 6.6458e-08  
a 2.301140868411032 4.3084e-09 au
q 1.535747609581294 1.5265e-07 au
i 6.743992468522408 3.8837e-06 deg
node 315.5497681428514 3.6781e-05 deg
peri 44.06093886301733 3.7051e-05 deg
M 171.7088443180285 5.3161e-06 deg
tp 2457992.360238152239
(2017-Aug-26.86023815)
1.8242e-05 TDB
period 1275.008955623186
3.49
3.5808e-06
9.804e-09
d
yr
n .2823509579382074 7.9297e-10 deg/d
Q 3.066534127240771 5.7415e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1558  
   data-arc span      31285 days (85.65 yr)  
   first obs. used      1933-08-27  
   last obs. used      2019-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46811  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:21:22  

Additional Information
 Earth MOID = .539748 au 
 Jupiter MOID = 2.41547 au 
 T_jup = 3.507 
[ 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 14.78   n/a PDS3 (MPC 17266)  
rotation period rot_per 8.994 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I. (1976) Icarus 29, 143-145.]
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
B-V BV 0.909   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.09 deg.
U-B UB 0.527   0.061 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.09 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices
SMASSII spectral type spec_B S   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)

2744 Birgitta (1975 RB)          Discovered 1975-Sep-04 by Lagerkvist, C.-I. at Kvistaberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1975 RB = 1933 QY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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