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Talk:List of asteroid close approaches to Earth in 2017

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Table improvement

[edit]

I'd like to improve display space usage and reduce repetition in tables. E.g., List of asteroid close approaches to Earth in 2017#Timeline of known close approaches less than one lunar distance from Earth in 2017 has this:

Date of
closest
approach 		Date
discovered 		Object Nominal geocentric
distance (AU)[a] 		Nominal
geocentric
dist. (LD) 		Size (m)
(approx.) 		(H)
(mag) 		Closer
to
Moon?
2017-01-09 2017-01-07[1] 2017 AG13 0.00139 AU (208,000 km; 129,000 mi) 0.54 13–41 26.1[2]
2017-01-25 2017-01-20[3] 2017 BX 0.00178 AU (266,000 km; 165,000 mi) 0.69 5–18 28.0[4]
2017-01-30 2017-01-29[5] 2017 BH30 0.000347 AU (51,900 km; 32,300 mi) 0.13[b] 4–12 28.8[6]
2017-02-02 2017-01-30[7] 2017 BS32 0.00109 AU (163,000 km; 101,000 mi) 0.42 7–24 27.3[8]
2017-02-23 2017-02-21[9] 2017 DG16 0.000920 AU (137,600 km; 85,500 mi) 0.36 3–9 29.3[10] Yes
...

which I'd like to improve to:

Date of
closest
approach 		Date
discovered 		Object Nominal geocentric distance[c] Size
(m) 		H Closer
to
Moon?
AU 000s
km 		000s
mi 		LD
2017-01-09 2017-01-07[11] 2017 AG13 0.00139 208 129 0.54 13–41 26.1[2]
2017-01-25 2017-01-20 2017 BX 0.00178 266 165 0.69 5–18 28.0
2017-01-30 2017-01-29 2017 BH30 0.000347 51.9 32.3 0.13 4–12 28.8
2017-02-02 2017-01-30 2017 BS32 0.00109 163 101 0.42 7–24 27.3
2017-02-23 2017-02-21 2017 DG16 0.000920 137.6 85.5 0.36 3–9 29.3 Yes
...

If there were such a thing as a μAU in common usage, that column could come down to 4 digits, and be easier for humans to parse as integers ~100–2000. Or maybe label it "10-6 AU"? Note, BTW, that the sorting of that column doesn't currently work, probably because of the converted values. A nice template could be created for the rows to eliminate alot of the wiki markup currently required. —[AlanM1 (talk)]— 09:55, 31 March 2020 (UTC)[reply]

Notes

  1. ^ Distance from the center of Earth to the center of the object. See the NASA/JPL Solar System Dynamics Glossary: Geocentric. Earth has a radius of approximately 6,400 km.
  2. ^ Closest approach for 2017 BH30 was over the Taymyr Peninsula.
  3. ^ Distance from the center of Earth to the center of the object. See the NASA/JPL Solar System Dynamics Glossary: Geocentric. Earth has a radius of approximately 6,400 km.

References

  1. ^ https://minorplanetcenter.net/db_search/show_object?object_id=2017+AG13
  2. ^ a b "JPL Small-Body Database Browser: (2017 AG13)" (last observation: 2017-01-09).
  3. ^ https://minorplanetcenter.net/db_search/show_object?object_id=2017+BX
  4. ^ "JPL Small-Body Database Browser: (2017 BX)" (last observation: 2017-01-25).
  5. ^ https://minorplanetcenter.net/db_search/show_object?object_id=2017+BH30
  6. ^ "JPL Small-Body Database Browser: (2017 BH30)" (last observation: 2017-01-30).
  7. ^ https://minorplanetcenter.net/db_search/show_object?object_id=2017+BS32
  8. ^ "JPL Small-Body Database Browser: (2017 BS32)" (last observation: 2017-02-02).
  9. ^ https://minorplanetcenter.net/db_search/show_object?object_id=2017+DG16
  10. ^ "JPL Small-Body Database Browser: (2017 DG16)" (last observation: 2017-02-23).
  11. ^ https://minorplanetcenter.net/db_search/show_object?object_id=2017+AG13
I think it is better when the AU conversion is done by an automated formula as people are often wrong. -- Kheider (talk) 14:52, 31 March 2020 (UTC)[reply]
@Kheider: Yes, that's my intent. With the source data from the SBDB in AU, a row might look like:
{{CA row |app_date=2017-01-09 |close_date=2017-01-07 |name_year=2017 |name_2=AG |name_3=13 |link=y |sbdb_id=3766433 |au=0.001395 |size=13–41 |mag=26.1 |bgcolor= |closer= }}
It would calculate the MPC and SBDB source refs and the distances in km, mi, and LD. —[AlanM1 (talk)]— 16:47, 31 March 2020 (UTC)[reply]
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