254 Augusta

{{Short description|Main-belt asteroid}}

{{Use dmy dates|date=October 2019}}

{{Infobox planet

| minorplanet = yes

| name = 254 Augusta

| background = #D6D6D6

| image = 000254-asteroid shape model (254) Augusta.png

| image_scale =

| caption = Modelled shape of Augusta from its lightcurve

| discovery_ref =

| discoverer = J. Palisa

| discovery_site = Vienna Obs.

| discovered = 31 March 1886

| mpc_name = (254) Augusta

| pronounced = {{IPAc-en|ɒ|ˈ|g|ʌ|s|t|ə}}Noah Webster (1884) A Practical Dictionary of the English Language

| alt_names = A886 FA

| named_after = Auguste von Littrow

| mp_category = Augusta{{·}}main-belt

| orbit_ref =

| epoch = 31 July 2016 (JD 2457600.5)

| uncertainty = 0

| observation_arc = 130.04 yr (47498 d)

| aphelion = {{Convert|2.4613|AU|Gm|abbr=on|lk=on}}

| perihelion = {{Convert|1.9281|AU|Gm|abbr=on}}

| semimajor = {{Convert|2.1947|AU|Gm|abbr=on}}

| eccentricity = 0.12147

| period = 3.25 yr (1187.5 d)

| mean_anomaly = 340.92°

| inclination = 4.5131°

| asc_node = 28.473°

| arg_peri = 233.14°

| avg_speed = 20.1 km/s{{citation needed|date=October 2015}}

| moid = {{Convert|0.916708|AU|Gm|abbr=on}}

| dimensions = {{val|12.11|1.1|ul=km}}

| rotation = {{Convert|5.8949|h|d|abbr=on|lk=on}}

| albedo = {{val|0.1695|0.036}}

| spectral_type = B–V = 0.845
U–B = 0.505
Tholen = S

| abs_magnitude = 12.13

| mean_motion = {{Deg2DMS|0.30315|sup=ms}} / day

| jupiter_moid = {{Convert|2.58938|AU|Gm|abbr=on}}

| tisserand = 3.656

}}

254 Augusta is a main-belt asteroid, discovered on 31 March 1886 by astronomer Johann Palisa at Vienna Observatory, Austria. The stony S-type asteroid measures about 12 kilometers in diameter. It is the first-numbered member of the Augusta family, after which the small Asteroid family and subgroup of the main-belt has been named. Augusta was named after the German–Austrian writer Auguste von Littrow (1819–1890), widow of astronomer Carl Ludwig von Littrow, who was a former director of the Vienna Observatory.