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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3325757961878723 4.8172e-08  
a 2.301760494387559 4.1988e-09 au
q 1.536250665332826 1.1109e-07 au
i 6.74400037205556 3.5889e-06 deg
node 315.544221494638 3.5313e-05 deg
peri 44.00313775373613 3.5554e-05 deg
M 284.727764409846 5.1976e-06 deg
tp 2459267.198724557926
(2021-Feb-21.69872456)
1.8721e-05 TDB
period 1275.523970931613
3.49
3.4902e-06
9.556e-09
d
yr
n .2822369537571797 7.7228e-10 deg/d
Q 3.067270323442292 5.5952e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1696  
   data-arc span      31796 days (87.05 yr)  
   first obs. used      1933-08-27  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45833  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:27  

Additional Information
 Earth MOID = .541088 au 
 Jupiter MOID = 2.41815 au 
 T_jup = 3.506 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456893.5 (2014-Aug-24.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3307682019156709 4.7912e-08  
q 1.541040550665752 1.1017e-07 au
tp 2456714.824921145065
(2014-Feb-26.32492115)
1.7084e-05 TDB
node 315.6322150180692 3.5216e-05 deg
peri 43.79071469415812 3.5477e-05 deg
i 6.751851183185464 3.5888e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1696  
   data-arc span      31796 days (87.05 yr)  
   first obs. used      1933-08-27  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45833  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:27  

Additional Information
 Jupiter MOID = 2.41815 au 
 T_jup = 3.506 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.295534210257986E-15 -5.276864017561966E-15 3.593469351391006E-13 1.190094459526668E-14 9.252075429620317E-15 -1.662461618676449E-14
q -5.276864017561966E-15 1.21382716778084E-14 -8.213848084800191E-13 -2.733305485736488E-14 -1.965255836798029E-14 3.82606123491663E-14
tp 3.593469351391006E-13 -8.213848084800191E-13 2.918725516632037E-10 5.240088738384432E-12 8.188029328420173E-11 -4.429158419358644E-12
node 1.190094459526668E-14 -2.733305485736488E-14 5.240088738384432E-12 1.240173586691725E-9 -1.230818468908826E-9 3.366187634010361E-11
peri 9.252075429620317E-15 -1.965255836798029E-14 8.188029328420173E-11 -1.230818468908826E-9 1.258616238214404E-9 -3.422001191442412E-11
i -1.662461618676449E-14 3.82606123491663E-14 -4.429158419358644E-12 3.366187634010361E-11 -3.422001191442412E-11 1.287956367542992E-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 14.78   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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