| Show | code ⇓ | author |
| Show | ADO | Adolph, C. |
| Show | ADM | Adams, E.R., Ciardi, D.R., Dupree, A.K., Gautier, T.N., III, Kulesa, C., & |
| Show | ADC | = Adrian College |
| Show | ADA | Adam, C. & Mugrauer, M. |
| Show | ACS | Acocks, H.F. |
| Show | ACG | Astrographic Catalog (Greenwich) (from Ccd2002 DD list) |
| Show | ACA | Ashcraft, A.C. |
| Show | AC | Clark, Alvan |
| Show | ABT | Abetti, G. |
| Show | ABS | Absil, O., Milli, J., Mawet, D., Lagrange, A.-M., Girard, J., Chauvin, G., |
| Show | ABR | Abrami, A. |
| Show | ABL | Bernal, A., Bernal, M., Miret, X., Tobal, T., Novalbos, I. & Santos, J.A. |
| Show | ABH | Abt, H.A. |
| Show | ABE | Aberasturi, M., Burgasser, A.J., Mora, A., Solano, E., Martin, E.L., Reid, I.N., & |
| Show | ABB | Abbuhl, E., Mutel, R.L., Lynch, C., & Guedel, M. |
| Show | AB | Ali, B. & Depoy, D.L. |
| Show | AAV | AAVSO Photometric All-Sky Survey (APASS), Data Release 6 |
| Show | AAR | Aarum Ulvars, V. & Engvold, O. |
| Show | AAQ | (Astronomical Association of Queensland) |
| Show | AAE | = Academy of Academic Excellence |
| Show | A | Aitken, R.G. |