Crater diameter sequence for central north Oceanus Procellarum for small aperture amateur telescopes

Graphic	Description
	Rükl chart number - Lunar longitude - Rükl chart boundary line
	Major feature - Primary crater - crater diameter in kilometers
	Satellite feature - crater diameter in kilometers - line pointing to primary crater
	Rima width in kilometers
	Rima width - feature not observable by amateur telescopes
	Crater with crater depth in kilometers - crater central peak with height in kilometers
	Dome - diameter and height in kilometers

Table 1 - Diameters of craters, 20km and smaller, by ascending Rükl chart number and ascending crater name, plotted on chart N=111

Name	Clat	Clon	Rükl	Diam
Galilaei S	15.4	-64.7	17	2
Galilaei T	16.2	-61.4	17	2
Galilaei V	17.1	-60.3	17	3
Galilaei W	17.8	-60.5	17	4
Krafft U	17.2	-64.7	17	3
Seleucus E	22.4	-63.9	17	4
Aristarchus F	21.7	-46.5	18	18
Aristarchus S	19.3	-46.2	18	4
Aristarchus T	19.6	-46.4	18	4
Aristarchus U	19.7	-48.6	18	4
Bessarion C	16	-42.6	18	9
Herodotus A	21.5	-52	18	10
Herodotus B	22.6	-55.4	18	6
Herodotus C	21.9	-55	18	5
Marius B	16.3	-47.3	18	12
Marius L	15.9	-55.7	18	8
Marius M	17.4	-54.9	18	6
Marius N	18.7	-54.7	18	4
Marius P	17.9	-51.3	18	4
Schiaparelli A	23	-62	18	7
Seleucus A	22	-60.5	18	6
Aristarchus D	23.7	-42.9	19	5
Aristarchus N	22.8	-42.9	19	3
Bessarion	14.9	-37.3	19	10
Bessarion A	17.1	-39.8	19	13
Bessarion B	16.8	-41.7	19	12
Bessarion D	19.8	-41.7	19	9
Bessarion E	15.4	-37.3	19	8
Bessarion G	14.9	-40.3	19	4
Bessarion W	16.7	-36.9	19	3
Brayley	20.9	-36.9	19	14
Brayley C	21.4	-39.4	19	9
Brayley E	21.2	-39.7	19	5
Brayley K	21.2	-41.7	19	3
Brayley L	20.9	-42.6	19	4
Galilaei	10.5	-62.7	28	15
Galilaei A	11.7	-62.9	28	11
Galilaei D	8.7	-62.7	28	1
Galilaei E	14	-61.8	28	7
Galilaei J	13	-61.9	28	4
Galilaei K	13	-62.7	28	3
Hermann A	0.4	-58.2	28	4
Hermann F	1.3	-55.4	28	5
Hermann H	0.9	-61.8	28	4
Hermann J	2.6	-57.4	28	4
Hermann K	2.4	-58.3	28	3
Hermann L	2.4	-59.1	28	3
Hermann R	0.6	-55.6	28	3
Hermann S	1	-55.5	28	4
Hevelius D	3.1	-60.8	28	8
Reiner N	5.4	-57.5	28	4
Encke E	0.3	-40.1	29	9
Encke X	0.9	-40.3	29	3
Hermann E	0.1	-52	29	4
Kepler C	10	-41.8	29	11
Kepler D	7.4	-41.9	29	10
Kepler E	7.4	-43.9	29	6
Maestlin	4.9	-40.6	29	7
Maestlin G	2	-42.1	29	4
Maestlin H	4.7	-43.5	29	7
Marius A	12.6	-46	29	15
Marius C	14	-47.6	29	11
Marius D	11.4	-45	29	9
Marius E	12.1	-52.7	29	6
Marius F	12.1	-45.3	29	6
Marius G	12.1	-50.6	29	3
Marius J	10.5	-46.9	29	3
Marius K	9.4	-50.6	29	4
Marius R	13.6	-50.3	29	5
Marius U	9.6	-47.6	29	3
Marius V	9.9	-48.3	29	2
Marius W	9.4	-49.7	29	3
Marius X	9.7	-54.9	29	5
Marius Y	9.8	-50.7	29	2
Reiner A	5.2	-51.4	29	10
Reiner C	3.5	-51.5	29	7
Reiner E	1.9	-49.6	29	4
Reiner G	3.3	-54.3	29	3
Reiner H	9.1	-54.7	29	8
Reiner K	8.1	-53.9	29	3
Reiner L	8	-54.6	29	6
Reiner Q	1.4	-50.9	29	3
Reiner S	2.2	-50.7	29	4
Reiner T	3.7	-52.2	29	2
Reiner U	4.1	-52.5	29	3
Suess	4.4	-47.6	29	8
Suess B	5.7	-47.3	29	8
Suess D	4.7	-46.5	29	7
Suess F	1.1	-44.6	29	7
Suess G	3.4	-48.4	29	4
Suess H	4	-45.7	29	4
Suess J	6.9	-48.5	29	3
Suess K	6.5	-50	29	3
Suess L	6.1	-50.5	29	5
Encke B	2.4	-36.8	30	12
Encke C	0.7	-36.4	30	9
Encke K	1.4	-37.2	30	4
Kepler A	7.2	-36.1	30	11
Kepler F	8.3	-39	30	7
Damoiseau G	-2.5	-55.6	39	4
Damoiseau L	-4.5	-59.3	39	14
Hermann	-0.9	-57	39	15
Hermann B	-0.3	-57.1	39	5
Flamsteed	-4.5	-44.3	40	20
Flamsteed D	-3.2	-44.9	40	6
Flamsteed E	-3.7	-46.1	40	2
Flamsteed K	-3.1	-43.7	40	4
Flamsteed X	-2.3	-47.3	40	3
Flamsteed Z	-1.3	-47.8	40	3
Hermann D	-2.3	-54	40	3
Wichmann C	-4.7	-37.4	41	3

Table 2 - Diameters of craters, 20km and smaller, by ascending diameter, descending latitude and descending longitude, plotted on chart N=111

Name	Clat	Clon	Rükl	Diam
Galilaei D	8.7	-62.7	28	1
Galilaei T	16.2	-61.4	17	2
Galilaei S	15.4	-64.7	17	2
Marius V	9.9	-48.3	29	2
Marius Y	9.8	-50.7	29	2
Reiner T	3.7	-52.2	29	2
Flamsteed E	-3.7	-46.1	40	2
Aristarchus N	22.8	-42.9	19	3
Brayley K	21.2	-41.7	19	3
Krafft U	17.2	-64.7	17	3
Galilaei V	17.1	-60.3	17	3
Bessarion W	16.7	-36.9	19	3
Galilaei K	13	-62.7	28	3
Marius G	12.1	-50.6	29	3
Marius J	10.5	-46.9	29	3
Marius U	9.6	-47.6	29	3
Marius W	9.4	-49.7	29	3
Reiner K	8.1	-53.9	29	3
Suess J	6.9	-48.5	29	3
Suess K	6.5	-50	29	3
Reiner U	4.1	-52.5	29	3
Reiner G	3.3	-54.3	29	3
Hermann K	2.4	-58.3	28	3
Hermann L	2.4	-59.1	28	3
Reiner Q	1.4	-50.9	29	3
Encke X	0.9	-40.3	29	3
Hermann R	0.6	-55.6	28	3
Flamsteed Z	-1.3	-47.8	40	3
Flamsteed X	-2.3	-47.3	40	3
Hermann D	-2.3	-54	40	3
Wichmann C	-4.7	-37.4	41	3
Seleucus E	22.4	-63.9	17	4
Brayley L	20.9	-42.6	19	4
Aristarchus U	19.7	-48.6	18	4
Aristarchus T	19.6	-46.4	18	4
Aristarchus S	19.3	-46.2	18	4
Marius N	18.7	-54.7	18	4
Marius P	17.9	-51.3	18	4
Galilaei W	17.8	-60.5	17	4
Bessarion G	14.9	-40.3	19	4
Galilaei J	13	-61.9	28	4
Marius K	9.4	-50.6	29	4
Reiner N	5.4	-57.5	28	4
Suess H	4	-45.7	29	4
Suess G	3.4	-48.4	29	4
Hermann J	2.6	-57.4	28	4
Reiner S	2.2	-50.7	29	4
Maestlin G	2	-42.1	29	4
Reiner E	1.9	-49.6	29	4
Encke K	1.4	-37.2	30	4
Hermann S	1	-55.5	28	4
Hermann H	0.9	-61.8	28	4
Hermann A	0.4	-58.2	28	4
Hermann E	0.1	-52	29	4
Damoiseau G	-2.5	-55.6	39	4
Flamsteed K	-3.1	-43.7	40	4
Aristarchus D	23.7	-42.9	19	5
Herodotus C	21.9	-55	18	5
Brayley E	21.2	-39.7	19	5
Marius R	13.6	-50.3	29	5
Marius X	9.7	-54.9	29	5
Suess L	6.1	-50.5	29	5
Hermann F	1.3	-55.4	28	5
Hermann B	-0.3	-57.1	39	5
Herodotus B	22.6	-55.4	18	6
Seleucus A	22	-60.5	18	6
Marius M	17.4	-54.9	18	6
Marius F	12.1	-45.3	29	6
Marius E	12.1	-52.7	29	6
Reiner L	8	-54.6	29	6
Kepler E	7.4	-43.9	29	6
Flamsteed D	-3.2	-44.9	40	6
Schiaparelli A	23	-62	18	7
Galilaei E	14	-61.8	28	7
Kepler F	8.3	-39	30	7
Maestlin	4.9	-40.6	29	7
Maestlin H	4.7	-43.5	29	7
Suess D	4.7	-46.5	29	7
Reiner C	3.5	-51.5	29	7
Suess F	1.1	-44.6	29	7
Marius L	15.9	-55.7	18	8
Bessarion E	15.4	-37.3	19	8
Reiner H	9.1	-54.7	29	8
Suess B	5.7	-47.3	29	8
Suess	4.4	-47.6	29	8
Hevelius D	3.1	-60.8	28	8
Brayley C	21.4	-39.4	19	9
Bessarion D	19.8	-41.7	19	9
Bessarion C	16	-42.6	18	9
Marius D	11.4	-45	29	9
Encke C	0.7	-36.4	30	9
Encke E	0.3	-40.1	29	9
Herodotus A	21.5	-52	18	10
Bessarion	14.9	-37.3	19	10
Kepler D	7.4	-41.9	29	10
Reiner A	5.2	-51.4	29	10
Marius C	14	-47.6	29	11
Galilaei A	11.7	-62.9	28	11
Kepler C	10	-41.8	29	11
Kepler A	7.2	-36.1	30	11
Bessarion B	16.8	-41.7	19	12
Marius B	16.3	-47.3	18	12
Encke B	2.4	-36.8	30	12
Bessarion A	17.1	-39.8	19	13
Brayley	20.9	-36.9	19	14
Damoiseau L	-4.5	-59.3	39	14
Marius A	12.6	-46	29	15
Galilaei	10.5	-62.7	28	15
Hermann	-0.9	-57	39	15
Aristarchus F	21.7	-46.5	18	18
Flamsteed	-4.5	-44.3	40	20

Name	Clat	Clong	Rükl	Depth_Height_kilometers
Aristarchus	23.7	-47.4	18	3.6
Herodotus	23.2	-49.7	18	1.4
Dome Herodotus 1	20.18	-49.82	18	0.6
Schiaparelli	23.4	-58.8	18	2.1
Bessarion	14.9	-37.3	19	0.9
Brayley	20.9	-36.9	19	2.3
Marius	11.9	-50.8	29	1.6
Domes Marius Hills	12.5	-54	29	0.3-0.6
Reiner	7	-54.9	29	2.5
Encke	4.6	-36.6	30	0.7
Galilaei	10.5	-62.7	30	2
Kepler	8.1	-38	30	2.2
Dome Kepler 1	8.92	-39.62	30	0.3

Corrections to the charts

After initial web posting, the following corrections were received regarding the crater sequence chart:

9/24/2006 - Wood, Charles W. (Professional lunar scientist). "Kepler is shown as having a depth of 2.2 km, but is actually 2.75 km, according to measures we made on LOIV images in the early 1970s. The telescopic errors are even larger at small crater diameters - Bessarian is given as 0.9 km deep but is actually 2.0 km." (Kaf - Updating the charts is deferred pending receipt of more corrections.)

Instructions

Use the Previous and Next buttons above the image to scroll between available charts.

Clicking on a chart opens a new window containing a high resolution (1920 x 1920 pixels) chart in jpg format.

Right-click on the high-resolution image to save the chart to your local hardrive.

If your browser supports expanded images, you can expand and pan over the high resolution image in the browser window. In Microsoft Internet Explorer, click on a white-screen area within the browser window. Then move your cursor over the image. The Expand image icon will display. Click this icon to view the 1920 x 1920 pixel image.

All available charts in jpg format can be downloaded at one time to your harddrive for local viewing by using the Download option below.
An Excel catalogue of approximately 2630 near-side craters of less than 20km in size is provided in the Download. By using Microsoft Excel's data filter feature, users can quickly develop a list of small craters on any Rükl chart. Sample worksheets used to develop the central north Oceanus Procellarum crater sequence chart displayed here are included in the Excel spreadsheet file.
Printing this document in Microsoft Internet Explorer encountered problems. A button is provided to display the crater sequence tables formatted for printing. Print the jpg formatted charts by downloading them to your local harddrive and using your operating system utilities to appropriately format them for your printer.
The author requests persons having other online crater sequence charts to forward their links for inclusion in this web document.

Downloads

Other crater sequence charts

Wood, C.A. 9/17/2004. Serenitatis Diameter Sequence. LPOD (Repeat of 5/1/2004 LPOD) http://www.lpod.org/?m=20060917
"Mardi" photonovore@yahoo.com. 9/17/2006. Clavius Crater Sequence Chart. http://www.cityastronomy.com/clavius-registered.jpg

Purpose

This crater sequence chart is intended as a resouce for amateur astronomers to explore crater sizes that are visible at various magnifications and apertures. The crater sequence chart extends from the lunar equator or north 24 selenographic latitude and to west 65 selenographic longitude.

By comparing the Clementine sinusodial projection with charts in Rükl's Atlas, small aperture telescope owners gain an appreciation of that selenographic latitude and longitude has on foreshortening the appearance of craters. Because the source catalogue reports small craters in one kilometer increments and the smallest crater mapped is 1 kilometer, this chart will be of less use to modern expert amateur lunar imagers who can image to sub-kilometer resolutions.

Chart Development

A catalogue of near-side craters smaller than 20km was developed in Microsoft Excel from the U.S.G.S. Gazetter of Planetary Nomenclature. Small crater sizes in the Gazetter are in reported 1 kilometer increments. The primary source for Gazetter lunar small crater sizes was Andersson & Whitaker (1982), who in turn relied on earlier unpublished measurements of craters taken from Lunar Orbitor IV images by Wood & Andersson (1973). See May 13, 2004 Lunar Picture of the Day for a discussion. Wood & Andersson's catalogue reports small crater diameters by both depth and diameter in 0.1 kilometer increments, but the catalogue is not readily available in a digital form. The level of precision of the data in Wood & Andersson's original catalogue was not carried forward into the current Gazetter.

U.S.G.S. Map-A-Planet was used to obtain a sinusodial projection of the Clementine 750 nm base map of the central north Oceanus Procellarum region. The crater catalogue based on the U.S.G.S. Gazetter was used to identify the crater size sequence. Rükl's Atlas of the Moon was consulted for chart boundaries. The sequence Rükl's Atlas chart boundaries were marked on the Clementine base image. Cherrington's atlas was consulted for crater depths.

Craters were selected based on having the same identification in the Gazetter and in Rükl's Atlas. Craters in the Gazetter with different designations in Rükl's Atlas were excluded from the chart to maintain consistency between sources commonly used by amateurs. Some craters located in high albedo areas were excluded. A few positive relief heights for domes were added from the GLR lunar dome database.

References and Acknowledgements

This project makes use of research materials supplied courtesy of the USGS Astrogeology Research Program.

Andersson, L.A. and Wood, C. 1978. Catalog of Lunar Craters (Unpublished).

Andersson, L.A. and Whitaker, E.A.1982. NASA Catalog of Lunar Nomenclature. NASA Reference Publication 1097. http://host.planet4589.org/astro/lunar/

Cherrington, Jr. E.H. 1984. Gazetter. In Exploring the Moon Through Binoculars and Small Telescopes. Dover.

Kapral, C.A. and Garfinkle, R.A. (Geologic Research Group). May 2005. GLR Catalogue of Lunar Domes (Draft). Web document. http://www.glrgroup.org/domes/kapralcatalog.htm

Rukl, A. 2004 (2ed). Atlas of the Moon. Sky Publishing.

USGS. 2006. Gazetteer of Planetary Nomenclature. http://planetarynames.wr.usgs.gov/jsp/FeatureTypes2.jsp?system=Earth&body=Moon&systemID=3&bodyID=11

USGS. 2006. Map-A-Planet. http://pdsmaps.wr.usgs.gov/maps.html

Wood, Charles. 5/13/2004. A New/Old Catalog of Lunar Craters. LPOD. http://www.lpod.org/archive/archive/2004/05/LPOD-2004-05-13.htm

Revisions

2006/09/24A - Added section with comments received that correct crater sequence sizes. Added reference to Wood and Anderrson (1978) and Andersson and Whitaker (1982) crater dimension studiesy.
2006/09/24A - To address printing problems within MS Explorer, added a hyperlink button to print tables separately.

Content-Child Safe Ratings

Disclaimers

Amateur content

This website contains amateur astronomer developed materials and is not suitable for citation as an authoritative source.

No copyright asserted

No copyright is asserted to any original content materials developed and included by this author in this website and the same are released to the public domain. No copyright is asserted as to any scientific fact or public domain image incorporated herein.

Prepared by and report errors or broken links to: K. Fisher 9/2006 fisherka@csolutions.net Org. 9/24/2006


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