Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .332575805213533 6.4877e-08  
a 2.301760494538812 4.2328e-09 au
q 1.536250644658867 1.4925e-07 au
i 6.744000894918455 3.8547e-06 deg
node 315.5442254433307 3.6731e-05 deg
peri 44.00313344140874 3.6996e-05 deg
M 284.7277641254942 5.4139e-06 deg
tp 2459267.198725591706
(2021-Feb-21.69872559)
1.9501e-05 TDB
period 1275.523971057339
3.49
3.5184e-06
9.633e-09
d
yr
n .2822369537293603 7.7853e-10 deg/d
Q 3.067270344418757 5.6405e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1574  
   data-arc span      31650 days (86.65 yr)  
   first obs. used      1933-08-27  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46778  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:44:26  

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

[ 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
2026-May-30 12:15 00:01 Thisb 0.0455293465184932 0.0455285137052209 0.0455301793318102 3.15309819104684 3.15309814355206 2461191.010417855 1.12051895518472 58.2361941739527 41.4299942992115 86.8341780112922 164128.291741061 T 26 CATAB v2.0f-lin.ifort 2020-May-20 01:44:36 2020-May-20 01:44
2183-Apr-06 23:49 < 00:01 Hygie 0.0390234724672738 0.0390196319688772 0.0390273129656091 5.30514898141399 5.30514879478507 2518480.492253574 0.97423728564517 191.334350374148 48.3327819275299 0.0561257593063553 30479.5520022747 T 26 CATAB v2.0f-lin.ifort 2020-May-20 01:44:36 2020-May-20 01:44

Alternate Designations
 1975 RB = 1933 QY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-30 19:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin