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Color-scheme proposal

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Note

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  • The original proposal (see below) has been simplified as described in {{Minor planet color code legend}}, which is as of 2016, not only used to color the section headings in {{Infobox planet}}, but also used to color the background in the partial minor planet lists.
  • The currently most obvious discrepancy is the background color for main-belt asteroids in {{Infobox planet}}, which still needs to changed from    to a generic grey such as   
  • The original discussion from September 2015, can be found on WT:AST (archive).

Description

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The templates {{Infobox planet}} and {{Infobox comet}} are used in about 3,500 articles on wikipedia (see number of transclusions for infobox planet and infobox comet). Both templates have a parameter that allows to set a background-color for the subheadings (either optional or hard-coded). This is a proposal for a color-scheme applied to these subheadings that corresponds to an object's classification. It's a simple 3-step classification, which neither claims to do justice to more intrinsic cases nor demands the template "infobox planet" to be changed. It's rather harmless and purely optional. I'm also prepared to make the actual changes myself.

Basic

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Categories

  Planets (no color)

  Moons

  Comets

  Dwarf planets[a]

Remaining objects

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Divison

CNO – cis-Neptunian objects

TNO – trans-Neptunian objects

Defaults

  CNOs (default)[b]

  TNOs (default)  

Subdivisions (by increasing semi-major axis)

  NEAs[c]

  MCAs

  Main-belt

  Trojans[d]

  Centaurs

  KBOs

  Others: SDOs, DDOs

Revised and currently used scheme (2016)

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Main page: Template:Minor planet color code legend
  Near-Earth obj.     MBA (inner)   MBA (outer)   Centaur
  Mars-crosser   MBA (middle)     Jupiter trojan    Trans-Neptunian obj.
  Unclassified
Rationale for amended colors
  • MBA's account for 97.5% of all minor planets (presumably also the largest segment among the MP-object articles by far). To use a generic "grey"-background color in {{Infobox planet}} seem most appropriate and will then also loosely correspond to the coloring used in the partial list. A grey color was previously intended for all the randomly colored articles about "Satellites". But this has not been implemented, so there is no conflict in re-assigning a new color (which has not been decided yet).
  • NEOs a Mars-crossers (MCA) had a too similar color, so that is could not be easily distinguished (screen-color configurations do vary alot indeed). MP-object articles of MCA still use the older color-version, while partial LoMP tables have been colored with the revised version.
  • Currently all infoboxes in the TNO-segment receive the same color. A distinction between KBOs, SDOs and DDOs is due to their small article number not very helpful (as of 2016, there are only 332 numbered TNOs out of a total of 1⁄2 million numbered MPs). However this may change in the future.
  • A distinction for inner, middle and outer MBAs will not be made for the bg-color in {{Infobox planet}}. Instead a generic "grey" will be used (as described above).
  • Hexcodes for above colors are:
#FFC2E0 NEOs #FA8072 MCs
#FEFEFE MBA (inner) #E9E9E9 MBA (middle)
#D6D6D6 MBA (outer) #C2FFFF JTs
#C7FF8F Centaurs #C2E0FF TNOs

Comments

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  1. ^ includes candidates, limit to be defined
  2. ^ literally anything that is found (permanently/most of the time) at or within Neptune's orbit
  3. ^ the comparably few near-Earth comets (NECs) are not included since they are already assigned to the basic category for comets
  4. ^ any type of trojan: Earth trojan, Mars trojans, Jupiter trojans, Neptune trojans?

Rules

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§1 Basic categories overrule everything else:
  • Planets: only the eight planets of the Solar System (no color, as currently the case). Exoplanets are not considered (they use a different template).
  • Dwarf planets: classification is not based on IAU (they are defined by wiki-editors). Colors from the subdivisions are never used, so Ceres is not colored as a main-belt asteroid.
  • Comets: NECs and Extinct comet, MBCs are all comets. Colors from the subdivisions are never used.
  • Moons: everything that does not directly orbit the Sun (includes trojan moons; minor-planet moon). Not used for: a.) binaries with no clear primary–secondary distinction b.) combined wikipedia articles that also include the primary, and c.) quasi-satellite.
§2 The remaining objects are divided into TNOs and CNOs. Default colors are used if no appropriate subdivision is available (which is identical to the color of a subdivision; so TNO=KBO and CNO=main-belt). This simplifies things: the color-scheme is a simple thing and not meant for special and rare cases.
§3 There is no third rule

Implementation

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Custom colors used in articles

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A number of articles have their individually given color. These include:

Moons

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Minor planets

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Examples

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Visual examples of color scheme

2011 EO40
Discovery[1]
Discovered byRichard A. Kowalski
(Mount Lemmon Survey)
Discovery dateMarch 10, 2011
Designations
Designation
2011 EO40
Apollo NEO PHA,[2][3][4]
Earth crosser
Orbital characteristics[3][5]
Epoch December 9, 2014 (JD 2457000.5)
(Uncertainty=6)
Aphelion2.5476 AU
Perihelion0.76061 AU
1.6541 AU
Eccentricity0.54016
2.13 y (777.0 d)
312.6°
Inclination3.3629°
50.303°
17.075°
Physical characteristics
Dimensions150-330 m[a][6]
21.5[3]
1995 SN55
Discovery
Discovered byA. Gleason
Discovery dateSeptember 20, 1995
Designations
1995 SN55
Centaur[3][7]
Orbital characteristics[3][8]
Epoch September 20, 1995 (JD 2449980.5)
Aphelion39.1 to 91 AU (Q)
Perihelion7.9 to 8.3 AU (q)
23.5 to 49 AU (a)
Eccentricity0.66 to 0.83
(Uncertainty=E)[3]
114 to 351 yr
180.2° (M)
Inclination4.97°
144.6°
49.3°
Physical characteristics
Dimensions295 km?[9]
276 km[10]
0.08 (assumed)[9][11][12]
6.0[3]
3793 Leonteus
Discovery [3]
Discovered byC. Shoemaker
E. Shoemaker [a]
Discovery sitePalomar Obs.
Discovery date11 October 1985
Designations
(3793) Leonteus
Named after
Leonteus
(Greek mythology)[13]
1985 TE3 · 1951 WT1
1961 TB · 1973 UJ3
1978 GO · 1980 KX1
1986 XO
Jupiter trojan [14]
(Greek camp)[15]
Orbital characteristics [3]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc55.67 yr (20,332 days)
Aphelion5.6800 AU
Perihelion4.7490 AU
5.2145 AU
Eccentricity0.0893
11.91 yr (4,349 days)
178.11°
0° 4m 58.08s / day
Inclination20.902°
200.52°
263.10°
Jupiter MOID0.1262 AU
TJupiter2.8610
Physical characteristics
Dimensions86.26 km
C
8.7[3][14] · 8.8[16][17]
Weywot
Discovery
Discovered byMichael E. Brown
Discovery dateFebruary 22, 2007
Designations
Designation
(50000) Quaoar I Weywot
Pronunciation/ˈweɪwɒt/
S/2006 (50000) 1
Orbital characteristics[18]
~14 500 km
Eccentricity0.14 ± 0.04
12.438 ± 0.005 d
Inclination14±4 or 150±4
(two solutions)
Satellite ofQuaoar
Physical characteristics
Equatorial radius
40 ± 5 km[19]
~37 km (12:1)[18]
~24.9
(9901) 1997 NV
Discovery
Discovered byKlet' Observatory
Discovery dateJuly 1, 1997
Designations
(9901) 1997 NV
1983 RD5, 1990 RF12
Orbital characteristics
Epoch October 27, 2007
Aphelion2.6505938 AU
Perihelion2.0456558 AU
2.3481248 AU
Eccentricity0.128813
1314.2567026 d
253.71002°
Inclination5.35259°
263.24401°
98.70340°
Physical characteristics
Dimensions~17.8 km[20]
~0.01
Surface temp. min mean max
Kelvin
Celsius
14.4
9P/Tempel
Discovery
Discovered byWilhelm Tempel
Designations
9P/1867 G1; 1867 II;
9P/1873 G1; 1873 I; 1873a
1879 III; 1879b
9P/1967 L1; 1966 VII
9P/1972 A1; 1972 V; 1972a
1978 II; 1977i
1983 XI; 1982j
1989 I; 1987e1
1994 XIX; 1993c
Orbital characteristics
Epoch May 1, 2009
Aphelion4.739 AU
Perihelion1.509 AU
3.124 AU
Eccentricity0.517
5.52 yr
(2016.85 days)
Inclination10.5251°
Physical characteristics
Dimensions7.6 km × 4.9 km (4.7 mi × 3.0 mi)[3][21]
Mass7.2×1013 to 7.9×1013 kg[21][22]
Mean density
0.62 g/cm³[23]
40.7 hours[3]
(15809) 1994 JS
Discovery
Discovered byDavid C. Jewitt and Jane X. Luu
Discovery dateMay 11, 1994
Designations
Designation
(15809) 1994 JS
TNO
3:5 resonance[8]
Orbital characteristics
Aphelion51.954 AU
Perihelion33.095 AU
42.524 AU
Eccentricity0.222
277.31 a (101,287 d)[24]
Inclination14.0°
56.3°
236.5°
Physical characteristics
Dimensions121 km[25]
Albedo0.09 (assumed)
7.8
(225088) 2007 OR10
Discovery[26]
Discovered by
Discovery date17 July 2007 [b]
Designations
Designation
(225088) 2007 OR10
SDO[7]
3:10 resonance (DES)[8]
Orbital characteristics[3]
Epoch JD 2457000.5 (9 December 2014)
Aphelion100.66 AU
Perihelion33.033 AU
66.85 AU
Eccentricity0.5058
546.6 yr
103.85° (M)
Inclination30.9376°
336.8153°
206.65°
Physical characteristics
Dimensions1280±210 km[27]
1200+300
−200 km[28][c]
Albedo0.185+0.076
−0.052 [27]
Temperature31 K[29]
Spectral type
red [28]
21.3 [30]
2.0 [3]
2004 VN112
Discovery
Discovery date2004
Designations
Designation
2004 VN112
E-SDO
(detached object)[8]
Orbital characteristics[8][3]
Epoch 2455800.5 (2011-Aug-27)
Aphelion652.2 AU (Q)
Perihelion47.32 AU (q)
349.8 AU (a)
Eccentricity0.8647
6542 a
0.11° (M)
Inclination25.52°
66.06° (Ω)
327.0° (ω)
Physical characteristics
Dimensions314 km (based on expected albedo)[10]
130–300 km[3][6]
Albedo0.04 (expected)[10]
Spectral type
Blue[10]
23.3[31]
6.4[3]
(9992) 1997 TG19
Discovery [3]
Discovered byT. Kagawa
T. Urata
Discovery siteGekko Observatory
Discovery date8 October 1997
Designations
(9992) 1997 TG19
1997 TG19 · 1974 HC1
1980 BD
Mars-crosser
Orbital characteristics [3]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc40.98 yr (14,969 days)
Aphelion2.8060 AU
Perihelion1.5377 AU
2.1718 AU
Eccentricity0.2919
3.20 yr (1,169 days)
268.06°
Inclination2.5941°
43.004°
234.76°
Earth MOID0.5231 AU
Physical characteristics
5.7402 h
14.5

 

 

Optional colors

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Potentially useful color to disamig current scheme (e.g. Trojans of Neptune that are currently receive centaurs/TNOs colors rather arbitrary)

  • |background= #a0ffa0   green

Unclassified minor planets as per current JPL-derived taxonomy

  • |background= #B88A00   unclassified

SDO - Scattered disc objects

  • |background= #B88A00   

Detached objects - ie. extended SDOs, extended scattered disc objects E-SDOs, scattered–extended, distant detached objects (DDO)

  • |background= #B88A00   
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Dummy refs

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  1. ^ Cite error: The named reference discovery was invoked but never defined (see the help page).
  2. ^ List Of Apollo Minor Planets
  3. ^ a b c d e f g h i j k l m n o p q r s t JPL Small-Body Database Browser: (2011 EO40) Cite error: The named reference "jpldata" was defined multiple times with different content (see the help page).
  4. ^ "List Of The Potentially Hazardous Asteroids (PHAs)". Minorplanetcenter.net. Retrieved 2014-06-27.
  5. ^ NEODyS-2 on 2011 EO40 Retrieved 2013-07-31
  6. ^ a b Absolute-magnitude conversion table (H) Cite error: The named reference "h" was defined multiple times with different content (see the help page).
  7. ^ a b "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2008-10-21.
  8. ^ a b c d e Marc W. Buie (1995-10-26). "Orbit Fit and Astrometric record for 95SN55". SwRI (Space Science Department). Retrieved 2008-10-21. Cite error: The named reference "Buie" was defined multiple times with different content (see the help page).
  9. ^ a b assumed to have a typical centaur albedo of 0.08
  10. ^ a b c d Cite error: The named reference Brown-dplist was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference tnoalbedo was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Bauer2013 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference springer was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference lcdb was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference MPC-Jupiter-Trojans was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference AKARI was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference WISE was invoked but never defined (see the help page).
  18. ^ a b Brown, Michael E.; Fraser, Wesley C. (2010). "Quaoar: A Rock in the Kuiper belt". The Astrophysical Journal. 714 (2): 1547. arXiv:1003.5911. Bibcode:2010ApJ...714.1547F. doi:10.1088/0004-637X/714/2/1547.
  19. ^ Fornasier et al. (2013)
  20. ^ Tedesco E.F.; Noah P.V.; Noah M.; Price S.D. "The supplemental IRAS minor planet survey (SIMPS)".
  21. ^ a b "Comet 9P/Tempel 1". The Planetary Society. Retrieved 2008-12-16.
  22. ^ Using a spherical diameter of 6.25 km; volume of a sphere * a rubble pile density of 0.62 g/cm³ yields a mass (m=d*v) of 7.9E+13 kg
  23. ^ D. T. Britt; G. J. Consol-magno SJ; W. J. Merline (2006). "Small Body Density and Porosity: New Data, New Insights" (PDF). Lunar and Planetary Science XXXVII. Retrieved 2008-12-16.
  24. ^ AstDyS: (15809) 1994JS
  25. ^ List of known trans-Neptunian objects
  26. ^ Cite error: The named reference MPEC2009-A42 was invoked but never defined (see the help page).
  27. ^ a b Cite error: The named reference TNOsCool4 was invoked but never defined (see the help page).
  28. ^ a b Cite error: The named reference Brown2011 was invoked but never defined (see the help page).
  29. ^ Cite error: The named reference PHL was invoked but never defined (see the help page).
  30. ^ Cite error: The named reference AstDys was invoked but never defined (see the help page).
  31. ^ "AstDyS 2004 VN112 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2014-03-28.


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