Get NEOCP orbits
Current NEOCP and PCCP orbit data
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Current NEOCP and PCCP orbit data
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Additional materialThis page collects additional graphics and related material. Current data graphicsThese graphics are rebuilt from the current published tables. Hover or focus a data point for its value. The future dispersion view is available in the separate Prediction tab. Ephemeris uncertaintyPurpose: shows how precisely the current positions are known. Display: each bar counts objects in one uncertainty range. Read: taller bars on the left mean more tightly constrained ephemerides. Motion against brightnessPurpose: helps match exposure time and search strategy to a target. Display: each point combines calculated brightness and apparent motion. Read: left is brighter and higher is faster; the motion axis advances in powers of ten. Station contributionsPurpose: shows which stations currently contribute most observations. Display: bar length is the observation count for each of the 15 leading stations. Read: longer bars mean a larger current contribution; hover for station name and object count. Classification developmentPurpose: reveals how identification outcomes developed over time. Display: each annual bar stacks identified, still observed, and unresolved CrossIDs records. Read: compare total height and the colour shares between years. CrossID publication timingPurpose: shows how long identification publication followed the first retained observation. Display: every matched historical CrossID is counted by elapsed-time range. Read: bars farther left represent faster publication; unmatched records remain reported rather than silently sampled. Current sky densityPurpose: locates crowded and sparse parts of the current search sky. Display: colour intensity counts positions in 15-degree RA/Dec cells. Read: right ascension runs from right to left; darker cells contain more objects. NEOCP positions on the bright-star skyPurpose: places every exact current position into a familiar stellar context and opens its full ephemeris. Display: all named NEOCP points overlay Hipparcos stars, d3-celestial Milky Way contours, and constellation segments. Read: right ascension runs from 24h at left to 0h at right; larger yellow-ringed points are currently less certain. Hover for position, brightness, motion, observations, arc, and uncertainty; select a point or its label to open the daily ephemeris.
Background:
Star source: ESA Hipparcos Catalogue, entries through V magnitude 6. Milky Way and constellation geometry: d3-celestial, served locally with this page. Ephemeris-uncertainty historyPurpose: compares the uncertainty value published in successive retained table builds. Display: samples run chronologically from left to right in UTC, but each sample belongs to that build's moving ephemeris reference time; this is not a same-epoch covariance curve. Read: a fall is an improvement at the then-current reference time. A stepped rise can come from a changed orbit solution, a rounded published value, or a reference time moving farther beyond the latest observation; it therefore need not decrease monotonically. Local distance reproductionPurpose: checks whether the independent nominal local propagation reproduces the established close-approach distance before calculated Moon values or variant margins are trusted. Display: established distance is on the x-axis and reproduced distance on the y-axis, both in AU on logarithmic scales; the diagonal means exact agreement. Read: circles pass the larger-of-0.01-AU-or-10-percent gate; crosses fail it. Hover for the exact difference and allowed tolerance. Observation arc lengthsPurpose: summarizes how much observational time supports the current solutions. Display: each bar counts objects in one observed-arc range. Read: bars farther right represent longer and generally better constrained arcs. Actual table insightsSix additional views use every current row from the full Actual table. Each subtitle states coordinate coverage; the completeness matrix shows missing analytical fields explicitly. Recovery urgencyPurpose: highlights objects most in need of recovery. Display: 97 of 97 current objects by observation age and arc length; bubble size is uncertainty, fill is brightness, and rings mark growth. Read: large, ringed points with old observations and short arcs deserve attention first. Close-approach calendarPurpose: schedules upcoming geometrically close passages. Display: 94 of 97 current objects with dated positive minimum distance; circles show geocentric distance and open diamonds MOID. Read: lower points are closer; move left to right through UTC time and use the table below for exact values. Observability windowPurpose: shows whether an object becomes easier or harder to observe near minimum distance. Display: 84 of 97 current objects with current and approach elongation/magnitude; open points are current and filled points are at approach. Read: follow each connecting line; farther right and higher means greater elongation and brighter magnitude. Station-specific observability calendarPurpose: turns the propagated object position into a precise planning view for one MPC station. Display: topocentric target and Sun altitude for the next twelve UTC hours; tooltips add topocentric DE440 Moon separation and current magnitude. Read: target values above the horizon while the Sun is below -12 degrees are the most useful planning windows. Planning aid: the object is propagated hourly from its nominal local orbit; Sun and Moon vectors come from the local DE440 kernel and are corrected with the selected station position before altitude and separation are calculated. Orbit uncertainty and local horizon obstructions are not included. Solution robustnessPurpose: compares the observational support and stability of orbit solutions. Display: 95 of 97 current objects by observation count and uncertainty; bubble size is sampled orbits, fill is arc length, and rings mark growth. Read: robust solutions tend toward many observations, low uncertainty, longer arcs, and no growth ring. Orbit geometryPurpose: compares the radial extent of all available current orbits with Earth's orbit. Display: 91 of 97 current objects as q-to-Q intervals with a marker at a. Read: lines crossing the 1 AU reference reach Earth's orbital distance; hover for eccentricity, inclination, MOID, and class. Actual field completenessPurpose: exposes which analyses are supported or blocked by missing Actual fields. Display: 97 of 97 current objects across 30 current, approach, observation, uncertainty, and orbit fields. Read: filled cells with a centre mark are present; pale slashed cells are missing. Actual data-quality summary97 current objects: Elom missing for 13; Magm missing for 13; Motm missing for 13; Dmin missing for 3; MOID missing for 3; Tmin missing for 3. Open the completeness graphics; select a matrix cell to identify the object and field. |