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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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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3325757980226127 4.9073e-08  
a 2.301760494425715 4.2005e-09 au
q 1.536250661135159 1.1315e-07 au
i 6.744000286605911 3.6044e-06 deg
node 315.5442205139908 3.5491e-05 deg
peri 44.00313871117661 3.5731e-05 deg
M 284.7277643102378 5.2122e-06 deg
tp 2459267.198724917481
(2021-Feb-21.69872492)
1.8774e-05 TDB
period 1275.52397096333
3.49
3.4916e-06
9.559e-09
d
yr
n .2822369537501618 7.7258e-10 deg/d
Q 3.067270327716271 5.5975e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1668  
   data-arc span      31756 days (86.94 yr)  
   first obs. used      1933-08-27  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45875  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:55:56  

Additional Information
 Earth MOID = .541088 au 
 Jupiter MOID = 2.41815 au 
 T_jup = 3.506 
[ 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-August); 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.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]
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

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