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2893 Peiroos (1975 QD)
Classification: Jupiter Trojan          SPK-ID: 2002893
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07704377480677044 5.2619e-08  
a 5.147401181325619 9.0917e-08 au
q 4.750825963871463 3.0363e-07 au
i 14.66430893575313 5.8879e-06 deg
node 108.7794729645618 2.043e-05 deg
peri 171.867477355075 4.5181e-05 deg
M 267.6610424785241 4.4361e-05 deg
tp 2459694.614868967389
(2022-Apr-25.11486897)
0.00053851 TDB
period 4265.603201516026
11.68
0.00011301
3.094e-07
d
yr
n .08439603568190622 2.236e-09 deg/d
Q 5.543976398779774 9.7922e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1850  
   data-arc span      31518 days (86.29 yr)  
   first obs. used      1933-01-25  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44571  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 22:29:45  

Additional Information
 Earth MOID = 3.73444 au 
 Jupiter MOID = .303298 au 
 T_jup = 2.930 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.23   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
diameter diameter 86.884 km 0.954 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 8.96 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Gonano, M.; Di Martino, M.; Mottola, S.; Neukum, G. (1991) Adv. Space Res. 11, no. 12, 197-200.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
[Stephens, R.D. (2017) Minor Planet Bull. 44, 123-125.]
[Stephens, R.D.; Warner, B.D. (2018) Minor Planet Bull. 45, 124-128.]
geometric albedo albedo 0.048   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
B-V BV 0.730   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=10.52, mean=10.54, max.=10.56) deg.
U-B UB 0.252   0.083 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=10.52, mean=10.54, max.=10.56) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices

2893 Peiroos (1975 QD)          Discovered 1975-Aug-30 by Felix Aguilar Observatory at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1975 QD = 1933 BJ = 1970 EE = 1979 YV4 = 1981 AP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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