Movatterモバイル変換

Asteroids with Satellites Database--Johnston's Archive

(285263) 1998 QE2

compiled by Wm. Robert Johnston
last updated16 November 2014

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary:NEA, Amor(PHA)

orbital data, primary (osculating elements)[JPL]:

semimajor axisa:	2.423106551 AU
orbital periodP:	3.77188781773725 yr (= 1377.708045 d)
eccentricitye:	0.571515197
perihelion distanceq:	1.038264332 AU
aphelion distanceQ:	3.807948769 AU
inclinationi:	12.8552998°
argument of perihelionω:	345.6556294°
ascending nodeΩ:	250.1503259°
mean anomalyM:	148.3901474°
perihelion passageT_P:	2013 May 20.1158337
Epoch:	2014 Dec 09
data arc:	1998-2014(1771 obs.)
Earth MOID:	0.0358143 AU
Jupiter Tisserand invariantT_J:	3.239

orbital data, secondary:

semimajor axisa_s:	6.212± 0.1 km[S14a]
separation/primary radiusa_s/r_p:	3.9 [*D]
separation/Hill radiusa_s/r_H:	0.030 [*E]
orbital periodP_s:	1.3046± 0.0004d [S14b]
eccentricitye_s:	<0.01[S14a]
normalized ang. mom.α_L:	?

other data, system (combined):

absolute mag.H:	17.3[MPC] 17.07 ± 0.67 [JPL]
slope parameterG:	(0.15) [*A]
effective diameterd_E:	3.09 km [*D]
geometric albedo:	0.05± 0.03[S14a]
color indexU-B:	?
color indexB-V:	?
taxonomic type:	?
massm:	?
densityρ:	0.82 g/cm³[S14a]
Hill radiusr_H:	210 km [*E]

other data, primary:

diameterd_p:	3.2± 0.3 km [S14b]
rotation periodRP_p:	4.751± 0.001h [H14b]
amplitude in mag., rotationalΔM:	?
pole directionΒ, λ:	?,?

other data, secondary:

diameterd_s:	0.8± 0.08km [S14b]
diameter ratiod_s/d_p:	0.25± 0.03 [*D]
component mag. differenceΔM:	3.0 [*D]
rotation periodRP_s:	1.3046± 0.0004h [S14b]

--(285263) 1998 QE2 --discovery and notes:

Primary discovered1998 Aug 19from Socorro, New Mexico, USAby LINEAR.Permanent number assigned 2011 Sep 12.

Companion discovered2013 May 29usingradar observations.Announced2013 May 30.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

Springmann, A., Taylor, P. A., Howell, E. S., Nolan, M. C., Benner, L. A. M., Brozović, M., Giorgini, J. D., & Margot, J. L. 2014, Lunar and Planetary Science ConferenceRadar Shape Model of Binary Near-Earth Asteroid (285263) 1998 QE2
Vodniza, A. Q. & Pereira, M. R. 2014, Lunar and Planetary Science ConferenceStudy of the Asteroid 1998 QE2
Hills, Kevin 2014, Minor Planet BulletinAsteroid Lightcurve Analysis at Riverland Dingo Observatory (RDO): 2013 Results
Vodniza, Alberto Q., Pereira, M. R., Arecibo Observatory Team, & JPL Target Asteroids Team 2013, AAS/Division for Planetary Sciences Meeting AbstractsThe Asteroid 1998 QE2
Butler, Bryan J., Gurwell, M. A., & Moullet, A. 2013, AAS/Division for Planetary Sciences Meeting AbstractsObservations of NEA 1998 QE2 with the SMA and VLA
Springmann, Alessondra, Brozović, M., Pravec, P., Taylor, P. A., Howell, E. S., Nolan, M. C., Benner, L. M., Busch, M. W., Giorgini, J. D., Magri, C., Margot, J., Naidu, S. P., Shepard, M. K., Marshall, S. E., Law, M. C., Galád, A., Világi, J., Gary, B. L., Hicks, M. D., Hills, K., Pray, D. P., & Vodniza, A. Q. 2013, AAS/Division for Planetary Sciences Meeting AbstractsBinary Near-Earth Asteroid (285263) 1998 QE2: Goldstone and Arecibo Radar Imaging and Lightcurve Observations
Hicks, M., Lawrence, K., Chesley, S., Chesley, J., Rhoades, H., Elberhar, S., Carcione, A., & Borlase, R. 2013, The Astronomer's TelegramPalomar Spectroscopy of Near-Earth Asteroids 137199 (1999 KX4), 152756 (1999 JV3), 163249 (2002 GT), 163364 (2002 OD20), and 285263 (1998 QE2).
Hicks, M., Buratt, B., & Dalba, P. 2013, The Astronomer's TelegramBVRI photometry of the Potentially Hazardous Asteroid 285263 (1998 QE2).

©2013, 2014by Wm. Robert Johnston.
Last modified16 November 2014.
Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.

[8]ページ先頭