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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3324461787041686 4.8223e-08  
a 2.302021399868598 4.2676e-09 au
q 1.536723182187061 1.1111e-07 au
i 6.744529885429879 3.5882e-06 deg
node 315.5398934977064 3.5284e-05 deg
peri 43.9629305623514 3.5523e-05 deg
M 341.192167806044 5.2582e-06 deg
tp 2459267.149777242890
(2021-Feb-21.64977724)
1.8717e-05 TDB
period 1275.74084881249
3.49
3.5475e-06
9.713e-09
d
yr
n .2821889730466046 7.847e-10 deg/d
Q 3.067319617550134 5.6863e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1700  
   data-arc span      31796 days (87.05 yr)  
   first obs. used      1933-08-27  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45863  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:11:37  

Additional Information
 Earth MOID = .539897 au 
 Jupiter MOID = 2.41886 au 
 T_jup = 3.506 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456900.5 (2014-Aug-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3307713585146554 4.7912e-08  
q 1.541053575846026 1.1017e-07 au
tp 2456714.828003141053
(2014-Feb-26.32800314)
1.7071e-05 TDB
node 315.6321552744834 3.5196e-05 deg
peri 43.79265219648711 3.5456e-05 deg
i 6.751857514123472 3.5875e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1700  
   data-arc span      31796 days (87.05 yr)  
   first obs. used      1933-08-27  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45863  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:11:37  

Additional Information
 Jupiter MOID = 2.41886 au 
 T_jup = 3.506 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.295514558251391E-15 -5.276794675325085E-15 3.593715388151296E-13 1.160727682568964E-14 9.567126695697824E-15 -1.660120641183887E-14
q -5.276794675325085E-15 1.213805602682435E-14 -8.21428876817566E-13 -2.66617514328941E-14 -2.036422317834685E-14 3.820632599106056E-14
tp 3.593715388151296E-13 -8.21428876817566E-13 2.914202086781999E-10 5.172168807229667E-12 8.17194795967415E-11 -4.420376604362557E-12
node 1.160727682568964E-14 -2.66617514328941E-14 5.172168807229667E-12 1.238781127532199E-9 -1.229444330082781E-9 3.377548862560466E-11
peri 9.567126695697824E-15 -2.036422317834685E-14 8.17194795967415E-11 -1.229444330082781E-9 1.257143651795015E-9 -3.433052201257811E-11
i -1.660120641183887E-14 3.820632599106056E-14 -4.420376604362557E-12 3.377548862560466E-11 -3.433052201257811E-11 1.287029207943361E-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 14.69   n/a E2021B10  
rotation period rot_per 8.994 h n/a LCDB (Rev. 2020-October); 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, 458-503.]
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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