[ hide orbit diagram ]
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.
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .07735467241888731 | 4.9054e-08 | |
| a | 5.145314826772759 | 7.8684e-08 | au |
| q | 4.747300683855708 | 2.9699e-07 | au |
| i | 14.66437261952795 | 4.4391e-06 | deg |
| node | 108.7831184033998 | 2.0054e-05 | deg |
| peri | 172.2293392106496 | 3.9978e-05 | deg |
| M | 301.1083557756654 | 3.6612e-05 | deg |
| tp | 2459697.876864509388
(2022-Apr-28.37686451) | 0.00043742 | TDB |
| period | 4263.010050577616
11.67 | 9.7787e-05
2.677e-07 | d
yr |
| n | .08444737303662275 | 1.9371e-09 | deg/d |
| Q | 5.54332896968981 | 8.477e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.0 |
|
n/a |
MPO473805 |
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 |
8.945 |
h |
n/a |
LCDB (Rev. 2020-October); 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.]
[Stephens, R. D.; Warner, B. D. (2019) MPB 46, 315-317.]
[Stephens, R.D.; Warner, B.D. (2020) Minor Planet Bull. 47, 285-289.] |
| 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.DB | Last Updated: 2003-08-29 |
|
Alternate Designations
| 1975 QD = 1933 BJ = 1970 EE = 1979 YV4 = 1981 AP |
|
|
