328 Gudrun

{{Short description|Main-belt asteroid}}

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

{{Infobox planet

| minorplanet = yes

| name = 328 Gudrun

| background = #D6D6D6

| image = 000328-asteroid shape model (328) Gudrun.png

| image_scale =

| caption = Modelled shape of Gudrun from its lightcurve

| discoverer = Max Wolf

| discovery_site = Heidelberg Obs.

| discovered = 18 March 1892

| mpc_name = (328) Gudrun

| pronounced = {{IPAc-en|'|g|ʊ|d|r|uː|n}}{{MW|Gudrun}}

| alt_names =

| named_after = Gudrun

| mp_category = Main belt

| epoch = 31 July 2016 (JD 2457600.5)

| semimajor = {{Convert|3.11062|AU|Gm|abbr=on}}

| perihelion = {{Convert|2.78126|AU|Gm|abbr=on}}

| aphelion = {{Convert|3.43998|AU|Gm|abbr=on|lk=on}}

| eccentricity = 0.10588

| period = {{cvt|2003.9|days|years|order=flip}}

| inclination = 16.1164°

| asc_node = 352.328°

| arg_peri = 103.924°

| mean_anomaly = 325.246°

| dimensions = {{val|122.92|5.2|ul=km}}
{{val|122.59|3.72|u=km}}

| mass = {{val|3.16|0.46|e=18|u=kg}}

| density = {{val|3.27|0.55|u=g/cm³}}

| rotation = {{Convert|10.992|h|d|abbr=on|lk=on}}

| spectral_type = Cgh

| abs_magnitude = 8.8

| albedo = {{val|0.0425|0.004}}

| mean_motion = {{Deg2DMS|0.179652|sup=ms}} / day

| orbit_ref =

| observation_arc = 104.41 yr (38135 d)

| uncertainty = 0

}}

328 Gudrun is a large main-belt asteroid. It was discovered by German astronomer Max Wolf on March 18, 1892, in Heidelberg. This minor planet is orbiting the Sun at a distance of {{val|3.11|ul=AU}} with a period of {{cvt|2003.9|days|years|disp=out}} and an orbital eccentricity of 0.106. The orbital plane is inclined at an angle of 16.1° to the plane of the ecliptic.

Analysis of the light curve generated from photometric data collected in March 2012 provide a rotation period estimate of {{val|10.992|0.002|u=hours}} with a brightness variation of {{val|0.32|0.02}} in B magnitude. A study in 2022 found a classification of Cgh for 328 Gudrun, suggesting this is a dark, carbonaceous asteroid.