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Kenyon SJ, Luu JX. Accretion in the Early Kuiper Belt. II. Fragmentation. \aj. 1999;118 (2) :1101-1119.

Kenyon SJ, Luu JX. Accretion in the Early Outer Solar System. \apj. 1999;526 (1) :465-470.

Maggio A, Favata F, Negoro H, Brickhouse N S, Dupree A K. ASCA X-ray observations of the super-metal-rich stars 30 Ari and eta Boo. \aap. 1999;352 :248-256.

Riess AG, Kirshner RP, Schmidt BP, Jha S, Challis P, Garnavich PM, Esin AA, Carpenter C, Grashius R, Schild RE, et al. BVRI Light Curves for 22 Type IA Supernovae. \aj. 1999;117 (2) :707-724.

Stanek K Z, Kaluzny J, Krockenberger M, Sasselov D D, Tonry J L, Mateo M. DIRECT Distances to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. III. Variables in the Field M31C. \aj. 1999;117 (6) :2810-2830.

Mochejska B J, Kaluzny J, Stanek K Z, Krockenberger M, Sasselov D D. DIRECT Distances to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. V. Variables in the Field M31F. \aj. 1999;118 (5) :2211-2228.

Kaluzny J, Mochejska B J, Stanek K Z, Krockenberger M, Sasselov D D, Tonry J L, Mateo M. DIRECT Distances to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. IV. Variables in the Field M31D. \aj. 1999;118 (1) :346-365.

Esser R, Sasselov D. On the Disagreement between Atmospheric and Coronal Electron Densities. \apjl. 1999;521 (2) :L145-L148.

Rauch KP, Holman M. Dynamical Chaos in the Wisdom-Holman Integrator: Origins and Solutions. \aj. 1999;117 (2) :1087-1102.

{Garc\'ıa-Sanchez J, Preston RA, Jones DL, Weissman PR, Lestrade J-F, Latham DW, Stefanik RP. Erratum: ``Stellar Encounters with the Oort Cloud Based on HIPPARCOS Data'' [Astron. J. 117, 1042 (1999)]. \aj. 1999;118 (1) :600-600.

Butler RP, Marcy GW, Fischer DA, Brown TM, Contos AR, Korzennik SG, Nisenson P, Noyes RW. Evidence for Multiple Companions to \ensuremath\upsilon Andromedae. \apj. 1999;526 (2) :916-927.

Dupree A K, Whitney B A, Pasquini L. Evolution of Chromospheric Activity: M67 Red Giants. \apj. 1999;520 (2) :751-762.

Kenyon SJ, Wood K, Whitney BA, Wolff MJ. Forming the Dusty Ring in HR 4796A. \apjl. 1999;524 (2) :L119-L123.

Torres G, Latham D W, Stefanik R P, Mader J. HD 205798: A New Low-Amplitude Variable Star in Cygnus. Information Bulletin on Variable Stars. 1999;4821 :1.

Alam MS, Predina JP. Identification and correction of nonlinearity in constant voltage-biased infrared sensor detected signals. In: Holst GC \procspie. Vol. 3701. ; 1999. pp. 296-307.

Holman MJ, Wiegert PA. Long-Term Stability of Planets in Binary Systems. \aj. 1999;117 (1) :621-628.

Torres G, Henry TJ, Franz OG, Wasserman LH. The Nearby Low-Mass Visual Binary Wolf 424. \aj. 1999;117 (1) :562-573.

Seager S, Sasselov D D, Scott D. A New Calculation of the Recombination Epoch. \apjl. 1999;523 (1) :L1-L5.

Murray N, Holman M. The Origin of Chaos in the Outer Solar System. Science. 1999;283 :1877.