The Mission Accessible Near-Earth Objects Survey: Four Years of Photometry

被引：15

作者：

Thirouin, Audrey ^{[1
]}

Moskovitz, Nicholas A. ^{[1
]}

Binzel, Richard P. ^{[2
]}

Christensen, Eric J. ^{[3
]}

DeMeo, Francesca E. ^{[2
]}

Person, Michael J. ^{[2
]}

Polishook, David ^{[4
]}

Thomas, Cristina A. ^{[5
,6
]}

Trilling, David ^{[6
]}

Willman, Mark C. ^{[7
]}

Burt, Brian ^{[1
]}

Hinkle, Mary L. ^{[6
,8
]}

Pugh, Teznie ^{[1
]}

机构：

[1] Lowell Observ, 1400 West Mars Hill Rd, Flagstaff, AZ 86001 USA

[2] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[3] Univ Arizona, Dept Planetary Sci, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[4] Weizmann Inst Sci, Dept Earth & Planetary Sci, Herzl St 234, IL-7610001 Rehovot, Israel

[5] PSI, 1700 East Ft Lowell Rd 106, Tucson, AZ 85719 USA

[6] NAU, San Francisco St, Flagstaff, AZ 86001 USA

[7] Univ Hawaii, Pukalani, HI 96788 USA

[8] UCF, 4000 Cent Florida Blvd, Orlando, FL 32816 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2018年 / 239卷 / 01期

基金：

美国国家科学基金会;

关键词：

minor planets; asteroids: general; ASTEROIDS; RADAR; POPULATION; BODIES; SPINS;

D O I：

10.3847/1538-4365/aae1b0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Over 4.5 years, the Mission Accessible Near-Earth Object Survey assembled 228 near-Earth object (NEO) light curves. We report rotational light curves for 82 NEOs, constraints on amplitudes and periods for 21 NEOs, light curves with no detected variability within the image signal-to-noise and length of our observing block for 30 NEOs, and 10 tumblers. We uncovered two ultra-rapid rotators with periods below 20 s,-2016. MA with a potential rotational periodicity of 18.4 s, and 2017. QG(18) rotating in 11.9 s-and estimated the fraction of fast/ultra-rapid rotators undetected in our project plus the percentage of NEOs with a moderate/long periodicity undetectable during our typical observing blocks. We summarize the findings of a simple model of synthetic NEOs to infer the object's morphology distribution using the measured distribution of light curve amplitudes. This model suggests that a uniform distribution of axis ratio can reproduce the observed sample. This suggests that the quantity of spherical NEOs (e.g., Bennu) is almost equivalent to the quantity of highly elongated objects (e.g., Itokawa), a result that can be directly tested thanks to shape models from Doppler delay radar imaging analysis. Finally, we fully characterized two NEOs-2013 YS2 and 2014 FA(7)-as appropriate targets for a potential robotic/human mission due to their moderate spin periods and Delta v.

引用

页数：14

共 38 条

[1] Scientific exploration of near-Earth objects via the Orion Crew Exploration Vehicle [J].

Abell, Paul A. ;

Korsmeyer, David J. ;

Landis, Rob R. ;

Jones, Thomas D. ;

Adamo, Daniel R. ;

Morrison, David D. ;

Lemke, Lawrence G. ;

Gonzales, Andrew A. ;

Gershman, Robert ;

Sweetser, Theodore H. ;

Johnson, Lindley N. ;

Lu, Ed .

METEORITICS & PLANETARY SCIENCE, 2009, 44 (12) :1825-1836

[2]

Bambach P, 2018, ARXIV180501750

[3]

Benner L.A.M., 2015, Asteroids, V1, P165

[4] Radar and optical observations and physical modeling of triple near-Earth Asteroid (136617) 1994 CC [J].

Brozovic, Marina ;

Benner, Lance A. M. ;

Taylor, Patrick A. ;

Nolan, Michael C. ;

Howell, Ellen S. ;

Magri, Christopher ;

Scheeres, Daniel J. ;

Giorgini, Jon D. ;

Pollock, Joseph T. ;

Pravec, Petr ;

Galad, Adrian ;

Fang, Julia ;

Margot, Jean-Luc ;

Busch, Michael W. ;

Shepard, Michael K. ;

Reichart, Daniel E. ;

Ivarsen, Kevin M. ;

Haislip, Joshua B. ;

LaCluyze, Aaron P. ;

Jao, Joseph ;

Slade, Martin A. ;

Lawrence, Kenneth J. ;

Hicks, Michael D. .

ICARUS, 2011, 216 (01) :241-256

[5] Radar observations and the shape of near-Earth ASTEROID 2008 EV5 [J].

Busch, Michael W. ;

Ostro, Steven J. ;

Benner, Lance A. M. ;

Brozovic, Marina ;

Giorgini, Jon D. ;

Jao, Joseph S. ;

Scheeres, Daniel J. ;

Magri, Christopher ;

Nolan, Michael C. ;

Howell, Ellen S. ;

Taylor, Patrick A. ;

Margot, Jean-Luc ;

Brisken, Walter .

ICARUS, 2011, 212 (02) :649-660

[6] Density of asteroids [J].

Carry, B. .

PLANETARY AND SPACE SCIENCE, 2012, 73 (01) :98-118

[7] Near Earth Objects and Their Physical Characterization [J].

Eluo, Jean-Baptiste Kikwaya .

VATICAN OBSERVATORY, CASTEL GANDOLFO: 80TH ANNIVERSARY CELEBRATION, 2018, 51 :27-40

[8] The rubble-pile asteroid Itokawa as observed by Hayabusa [J].

Fujiwara, A. ;

Kawaguchi, J. ;

Yeomans, D. K. ;

Abe, M. ;

Mukai, T. ;

Okada, T. ;

Saito, J. ;

Yano, H. ;

Yoshikawa, M. ;

Scheeres, D. J. ;

Barnouin-Jha, O. ;

Cheng, A. F. ;

Demura, H. ;

Gaskell, R. W. ;

Hirata, N. ;

Ikeda, H. ;

Kominato, T. ;

Miyamoto, H. ;

Nakamura, A. M. ;

Nakamura, R. ;

Sasaki, S. ;

Uesugi, K. .

SCIENCE, 2006, 312 (5778) :1330-1334

[9] Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution [J].

Hanus, J. ;

Durech, J. ;

Broz, M. ;

Marciniak, A. ;

Warner, B. D. ;

Pilcher, F. ;

Stephens, R. ;

Behrend, R. ;

Carry, B. ;

Capek, D. ;

Antonini, P. ;

Audejean, M. ;

Augustesen, K. ;

Barbotin, E. ;

Baudouin, P. ;

Bayol, A. ;

Bernasconi, L. ;

Borczyk, W. ;

Bosch, J. -G. ;

Brochard, E. ;

Brunetto, L. ;

Casulli, S. ;

Cazenave, A. ;

Charbonnel, S. ;

Christophe, B. ;

Colas, F. ;

Coloma, J. ;

Conjat, M. ;

Cooney, W. ;

Correira, H. ;

Cotrez, V. ;

Coupier, A. ;

Crippa, R. ;

Cristofanelli, M. ;

Dalmas, Ch ;

Danavaro, C. ;

Demeautis, C. ;

Droege, T. ;

Durkee, R. ;

Esseiva, N. ;

Esteban, M. ;

Fagas, M. ;

Farroni, G. ;

Fauvaud, M. ;

Fauvaud, S. ;

Del Freo, F. ;

Garcia, L. ;

Geier, S. ;

Godon, C. ;

Grangeon, K. .

ASTRONOMY & ASTROPHYSICS, 2013, 551

[10]

Hestroffer D, 2017, AGUFM

← 1 2 3 4 →