Wednesday, 3 December 2025

Wounded Magnetosphere Longitudinal Balance Points / two


Concrete, map-ready southern-hemisphere “counterparts” on the same longitudes as Dnipro and Jerusalem, with coordinates, the closest significant settlements / islands / landmarks, and how far they are from those points. I’ll also show the alternative you asked for where Jerusalem is used as the balance point for Dnipro (that produces a point that lies north of the equator — I’ll explain why). I did the distance checks using great-circle math and looked up nearby place pages for the named settlements/islands.

I’ll assume the precise longitudes we used earlier:

  • Dnipro (Dnieper city) — 48.4647°N, 35.0462°E (I’ll keep 35.0462°E as the Dnipro meridian).

  • Jerusalem — 31.77196°N, 35.21702°E (kept exactly). (Wikipedia)



1) “Equator = balance point” (mirror across the Equator)

Mirror a northern latitude across the equator by flipping the sign of latitude (N → the same number S) while keeping the same longitude.

A — Dnipro (mirror across equator)

  • Northern point: 48.4647°N, 35.0462°E (Dnipro).

  • Southern (equator-mirrored) grid point: 48.4647°S, 35.0462°E

Closest significant land / features to 48.4647°S, 35.0462°E:

  • Prince Edward Islands (Marion Island) — Marion Island (Marion / Mascarin Peak) is the nearest significant land mass.

    • Marion Island (approx.)46.87°S, 37.73°E (Prince Edward Islands, South Africa admin). (Wikipedia)

    • Great-circle distance (approx.): ~268 km from 48.4647°S,35.0462°E to Marion Island (Marion). (calculated).

  • Status/notes: the mirrored point lies in the Southern Indian Ocean — open ocean; there is no inhabited settlement at the exact coordinate. Marion Island is an active sub-Antarctic research island (seasonal staff), the closest land of note. (Wikipedia)

Map reference to paste into any map:
48.4647S, 35.0462E
(Or in decimal for mapping apps: -48.4647, 35.0462)



B — Jerusalem (mirror across equator)

  • Northern point: 31.77196°N, 35.21702°E (Jerusalem). (Wikipedia)

  • Southern (equator-mirrored) grid point: 31.77196°S, 35.21702°E (decimal: -31.77196, 35.21702)

Closest significant land / settlements to 31.77196°S, 35.21702°E:

  • This coordinate lies in the southern Indian Oceaneast of southern Africa (i.e., offshore). There is no continental settlement at the exact point. The nearest populated / coast places (by great-circle distance) are on the southeastern African coast:

    • Richards Bay, KwaZulu-Natal, South Africa — approx coords: 28.78°S, 32.09°EDistance ≈ 448 km (the closest major port/town among the options checked). (Wikipedia)

    • Maputo (Mozambique) — 25.97°S, 32.58°E. Distance ≈ 694 km.

    • East London (South Africa) — ~32.98°S, 27.87°E. Distance ≈ 703 km.

Takeaway: Jerusalem mirrored across the equator places you in the open Indian Ocean ~400–800 km offshore; the nearest significant populated places are the South African / Mozambican east-coast ports (Richards Bay being the closest of the ports checked).

Map reference: -31.77196, 35.21702



2) “Jerusalem is the balance point for Dnipro” (mirror Dnipro across Jerusalem)

You asked for the grid point where Jerusalem is the balance point for Dnipro. Interpreting “balance point” as Jerusalem being the midpoint (by latitude) between Dnipro and the counterpart point along the same longitude, the algebra is:

  • midpoint latitude = (latitude_Dnipro + latitude_counterpart) / 2 = latitude_Jerusalem
    → latitude_counterpart = 2·latitude_Jerusalem − latitude_Dnipro

Using the values above:

  • lat(Dnipro) = 48.4647°N

  • lat(Jerusalem) = 31.77196°N

Compute: lat_counterpart = 2×31.77196 − 48.4647 = 15.07922°N.
(That is 15.07922°N, not a southern-hemisphere latitude — so the mirrored point across Jerusalem lies still north of the equator.)

Therefore: there is no southern-hemisphere point produced by mirroring Dnipro across Jerusalem — the mirror falls at 15.07922°N (northern hemisphere). I’ll present that point and nearest settlements / landmarks below.

A — Dnipro mirrored across Jerusalem (Jerusalem as midpoint)

  • Calculated grid point (same longitude as Dnipro):

    • Latitude: 15.07922°N

    • Longitude: same as Dnipro, 35.0462°E

    • Map coordinates (decimal): 15.07922, 35.0462

Closest settlements / landmarks to 15.07922°N, 35.0462°E:

  • This falls in eastern Sudan (close to the Sudan–Ethiopia border / Al Qadarif region) — inland, not coastal. Nearby notable towns / administrative centres (great-circle distances, approximate):

    • Al-Qadarif / El-Gadarif (Gedaref), Sudan — regional centre of Al Qadarif state. Approx distance ≈ 122 km (Gedaref coordinates ~14.03°N, 35.3833°E). (Wikipedia)

    • Kassala (Sudan) — regional city, approx distance ≈ 151 km. (Kassala coords ~15.45°N, 36.4°E).

    • Khartoum (Sudan) — national capital, approx distance ≈ 271 km (Khartoum ~15.50°N, 32.56°E).

  • Local geography / landmarks: eastern Sudan is an agricultural plain in places, with seasonal wadis and rivers that feed the Nile Basin (Atbara river system lies in the region to the northwest). The point is inland plains / semi-arid agricultural country (Sudan’s eastern provinces). (Wikipedia)

Map reference: 15.07922, 35.0462



Quick summary table (map-ready)

  • Dnipro (orig): 48.4647, 35.0462 (48.4647°N, 35.0462°E).

  • Dnipro mirrored at Equator: -48.4647, 35.0462 → nearest land: Marion Island (Prince Edward Islands)(~46.87°S,37.73°E), ~268 km from the coordinate. (Wikipedia)

  • Jerusalem (orig): 31.77196, 35.21702 (31.77196°N, 35.21702°E). (Wikipedia)

  • Jerusalem mirrored at Equator: -31.77196, 35.21702 → open Indian Ocean, nearest major settlements/coast: Richards Bay, South Africa (~28.78°S,32.09°E), ~448 km away. (Wikipedia)

  • Dnipro mirrored across Jerusalem (Jerusalem midpoint): 15.07922, 35.0462 → inland eastern Sudan(near El-Gadarif / Gedaref), nearest regional capital El-Gadarif ~122 km. (Wikipedia)



Notes, assumptions & limitations

  • I used the exact longitudes given above for the Dnipro / Jerusalem points. Small changes in longitude (±0.1–0.5°) can move the mirrored southern points onto slightly different nearby islands or shorelines — I reported the nearest major islands / towns.

  • Distances I quoted are straight-line (great-circle) distances, rounded to the nearest km (computed). For ocean points the nearest land may be an uninhabited sub-Antarctic island (as for the Dnipro→equator mirror).

  • The “Jerusalem as balance point for Dnipro” calculation produces a northern-hemisphere latitude (15.07922°N). That is simply arithmetic: Jerusalem lies between Dnipro and that point, but both remain northern latitudes. So there is no southern-hemisphere counterpart for that specific balance-point interpretation. I explained the algebra above so you can re-use it.




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