Units in VizieR

Symbol
    (the (*) indicates non-standard units)compute:
 %              percent                         10–2
 A              Ampere                          A
 a              year                            3.15576×10+7s
 a0             (Bohr radius)                   5.29177×10–11m
 al             light-year                      9.46053×10+15m
 alpha          (fine structure constant)       7.29735×10–3
 Angstroem      Angstroem(0.1nm)  (*)           10–10m
 Angstrom       Angstroem(0.1nm)  (*)           10–10m
 arcm           minute of arc                   4.62963×10–5
 arcmin         minute of arc                   4.62963×10–5
 arcs           second of arc                   7.71605×10–7
 arcsec         second of arc                   7.71605×10–7
 atm            atmosphere                      1.01325×10+5Pa (kg⋅m–1⋅s–2)
 AU             astronomical unit               1.49598×10+11m
 au             astronomical unit               1.49598×10+11m
 bar            bar(10+5Pa)  (*)                10+5Pa (kg⋅m–1⋅s–2)
 barn           barn(10–28m2)                   10–28m+2
 bit            binary information unit          
 byte           byte(8bits)                      
 C              Coulomb                         C (s⋅A)
 c              c(speed_of_light)               2.99792×10+8m⋅s–1
 cal            calorie  (*)                    4.1854J (kg⋅m+2⋅s–2)
 cd             candela(lumen/sr)               cd
 Crab           Crab (X-ray) flux               1.43×10–11kg⋅s–3
 ct             count                            
 D              Debye (dipole)                  3.33333×10–30m⋅s⋅A
 d              day                             8.64×10+4s
 deg            degree                          2.77778×10–3
 degC           Celsius                         K
 degF           Fahrenheit  (*)                 5.55556×10–1K
 degree         degree                          2.77778×10–3
 dyn            dyne(10–5N)  (*)                10–5N (kg⋅m⋅s–2)
 e              e(electron_charge)              1.60218×10–19C (s⋅A)
 eps0           (electric constant)             8.85419×10–12kg–1⋅m–3⋅s+4⋅A+2
 erg            erg(10–7J)  (*)                 10–7J (kg⋅m+2⋅s–2)
 eV             electron-Volt                   1.60218×10–19J (kg⋅m+2⋅s–2)
 F              Farad                           F (kg–1⋅m–2⋅s+4⋅A+2)
 G              G(gravitation constant)         6.673×10–11kg–1⋅m+3⋅s–2
 g              gram                            10–3kg
 gauss          Gauss(10–4T)  (*)               10–4T (kg⋅s–2⋅A–1)
 geoMass        Earth mass                      5.9742×10+24kg
 H              Henry                           H (kg⋅m+2⋅s–2⋅A–2)
 h              hour                            3.6×10+3s
 \h             hbar(Planck constant)           1.05457×10–34kg⋅m+2⋅s–1
 hr             hour(use 'h')  (*)              3.6×10+3s
 Hz             Herz                            Hz (s–1)
 inch           inch  (*)                       2.54×10–2m
 J              Joule                           J (kg⋅m+2⋅s–2)
 JD             Julian Day                      8.64×10+4s
 jovMass        Jupiter mass                    1.8986×10+27kg
 Jy             Jansky(10–26W/m2/Hz)            10–26kg⋅s–2
 K              Kelvin                          K
 k              k(Boltzmann)                    1.38065×10–23kg⋅m+2⋅s–2⋅K–1
 kg             kilogram                        kg
 l              litre  (*)                      10–3m+3
 lm             lumen                           7.95775×10–2cd
 Lsun           solar luminosity                3.826×10+26W (kg⋅m+2⋅s–3)
 lx             lux(lm/m2)                      7.95775×10–2m–2⋅cd
 lyr            light-year (c*yr)  (*)          9.46053×10+15m
 m              metre                           m
 mag            magnitude                       mag
 mas            milli-second of arc             7.71605×10–10
 me             me(electron_mass)               9.10938×10–31kg
 Mgeo           Earth mass                      5.9742×10+24kg
 min            minute                          6×10+1s
 MJD            Mod. Julian Date (JD–2400000.5) 8.64×10+4s
 Mjup           Jupiter mass                    1.8986×10+27kg
 mmHg           mercury_mm  (*)                 1.33322×10+2Pa (kg⋅m–1⋅s–2)
 mol            mole                            mol
 month          month  (*)                       
 mp             mp(proton_mass)                 1.67266×10–27kg
 Msun           solar mass                      1.989×10+30kg
 mu0            (magnetic constant)             1.25664×10–6kg⋅m⋅s–2⋅A–2
 muB            (Bohr magneton)                 9.27401×10–28m+2⋅A
 N              Newton                          N (kg⋅m⋅s–2)
 Ohm            Ohm(V/A)                        Ohm (kg⋅m+2⋅s–3⋅A–2)
 Pa             Pascal                          Pa (kg⋅m–1⋅s–2)
 pc             parsec                          3.0857×10+16m
 ph             photon                           
 pi             pi(=3.14...)                    3.14159
 pix            pixel                            
 ppm            part per million                10–6
 R              R(gas_constant)                 8.3143kg⋅m+2⋅s–2⋅K–1⋅mol–1
 rad            radian                          1.59155×10–1
 Rgeo           Earth radius (eq)               6.3781×10+6m
 Rjup           Jupiter radius (eq)             7.1492×10+7m
 Rsun           solar radius                    6.9599×10+8m
 Ry             Rydberg(13.6eV)                 2.17989×10–18J (kg⋅m+2⋅s–2)
 S              Siemens(A/V)                    S (kg–1⋅m–2⋅s+3⋅A+2)
 s              second                          s
 sec            second (use 's') (*)            s
 solLum         solar luminosity                3.826×10+26W (kg⋅m+2⋅s–3)
 solMass        solar mass                      1.989×10+30kg
 solRad         solar radius                    6.9599×10+8m
 sr             steradian                       7.95775×10–2
 Sun            Solar unit                       
 T              Tesla                           T (kg⋅s–2⋅A–1)
 t              ton  (*)                        10+3kg
 u              atomic mass unit                1.66054×10–27kg
 uas            micro-second of arc             7.71605×10–13
 V              Volt                            V (kg⋅m+2⋅s–3⋅A–1)
 W              Watt                            W (kg⋅m+2⋅s–3)
 Wb             Weber(V⋅s)                      Wb (kg⋅m+2⋅s–2⋅A–1)
 yr             year                            3.15576×10+7s
 °             degree                          2.77778×10–3
 °C            Celsius                         K
 °F            Fahrenheit  (*)                 5.55556×10–1K
 µ0            (magnetic constant)             1.25664×10–6kg⋅m⋅s–2⋅A–2
 µas           micro-second of arc             7.71605×10–13
 Å             Angstroem(0.1nm)  (*)           10–10m
 "d:m:s"        degree arcminute arcsecond (sexagesimal angle from degree)2.77778×10–3
 "date"         Fully qualified date            8.64×10+4s
 "datime"       Fully qualified date/time       8.64×10+4s
 "day"          Day of month number             8.64×10+4
 "h:m:s"        hour minutes seconds (sexagesimal time from hours)3.6×10+3s
 "h:m"          hour minutes (sexagesimal time from hours)3.6×10+3s
 "HH:MM:SS"     hour minutes seconds (sexagesimal time)3.6×10+3s
 "HHMMSS"       hour minutes seconds (sexagesimal time without separator)3.6×10+3s
 "m:s"          minutes seconds (sexagesimal time from minutes)6×10+1s
 "MM/YY"        Month/Year(from 1900)           8.64×10+4s
 "MM/yy"        Month/Year(from 2000)           8.64×10+4s
 "month"        Month name or number            8.64×10+4
 "Y-M-D,h:m:s"  Fully qualified date/time       8.64×10+4s


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