276P/Vorobjov
Metadata
| Parameter | Value |
|---|---|
| Designation | 276P/Vorobjov |
| Type | P |
| Perihelion (tp_cal, UTC) | 2024-12-12T17:38:23.265600Z |
| Orbit solution date (soln_date, UTC) | 2026-03-07T14:43:35Z |
| Obs used | 1273 |
| NEO | - |
| M1 | 11.000 |
| K1 | 7.500 |
| PC | 0.030 |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2023-02-01.0000000 |
| e | 0.26806229 |
| q (au) | 3.898225 |
| a (au) | 5.325897 |
| i (deg) | 14.811133 |
| Ω (om, deg) | 211.347487 |
| ω (w, deg) | 199.482340 |
| M (ma, deg) | 305.412530 |
Magnitude
Scatter + Global Linear
$$ M_a = (9.696 + 3.107\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 9.696 |
| n | 3.107 |
| gf | 1.000 |
| gb | -0.959 |
| k | 1.000 |
| δ90 | 10.000 |
| Parameter | Symbol | Range | Description |
|---|---|---|---|
| Absolute magnitude at 1 AU from Sun and Earth | H0 | -5 to 20 | Intrinsic brightness of the comet |
| Photometric slope parameter | n | 2 to 6 | Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor | gf |
0.8 to 1 | Degree of forward scattering |
| Backward scattering asymmetry factor | gb |
-1 to -0.5 | Degree of backward scattering |
| Partitioning coefficient | k | 0.8 to 1 | Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio | δ90 | 1 to 10 | Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) | End (UTC) | a | b |
|---|---|---|---|
| 2019-05-02 | 2022-09-01 | -18.3765 | +14.840 |
| 2022-09-01 | 2024-12-10 | +14.8812 | -8.885 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Finding Chart
Ephemeris
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 07:06:55.60 | +09:09:58.5 | HIP 34215 | 18.94 |
| 2026-05-12 12:00 | 07:07:21.23 | +09:10:10.7 | HIP 34215 | 25.25 |
| 2026-05-13 00:00 | 07:07:46.96 | +09:10:22.0 | HIP 34215 | 31.59 |
| 2026-05-13 12:00 | 07:08:12.77 | +09:10:32.4 | HIP 34588 | 25.53 |
| 2026-05-14 00:00 | 07:08:38.68 | +09:10:42.1 | HIP 34588 | 19.50 |
| 2026-05-14 12:00 | 07:09:04.67 | +09:10:50.9 | HIP 34588 | 13.78 |
| 2026-05-15 00:00 | 07:09:30.74 | +09:10:58.9 | HIP 34588 | 9.06 |
| 2026-05-15 12:00 | 07:09:56.90 | +09:11:06.1 | HIP 34588 | 7.57 |
| 2026-05-16 00:00 | 07:10:23.15 | +09:11:12.5 | HIP 34588 | 10.79 |
| 2026-05-16 12:00 | 07:10:49.48 | +09:11:18.0 | HIP 34672 | 11.37 |
| 2026-05-17 00:00 | 07:11:15.89 | +09:11:22.7 | HIP 34672 | 12.99 |
| 2026-05-17 12:00 | 07:11:42.39 | +09:11:26.6 | HIP 34672 | 17.15 |
| 2026-05-18 00:00 | 07:12:08.96 | +09:11:29.6 | HIP 34672 | 22.49 |
| 2026-05-18 12:00 | 07:12:35.61 | +09:11:31.8 | HIP 34672 | 28.37 |
| 2026-05-19 00:00 | 07:13:02.34 | +09:11:33.2 | HIP 34672 | 34.53 |
| 2026-05-19 12:00 | 07:13:29.15 | +09:11:33.7 | HIP 35101 | 35.02 |
| 2026-05-20 00:00 | 07:13:56.03 | +09:11:33.4 | HIP 35101 | 29.57 |
| 2026-05-20 12:00 | 07:14:22.99 | +09:11:32.3 | HIP 35101 | 24.71 |
| 2026-05-21 00:00 | 07:14:50.03 | +09:11:30.3 | HIP 35101 | 20.86 |
| 2026-05-21 12:00 | 07:15:17.13 | +09:11:27.5 | HIP 35101 | 18.68 |
| 2026-05-22 00:00 | 07:15:44.31 | +09:11:23.9 | HIP 35101 | 18.78 |
| 2026-05-22 12:00 | 07:16:11.56 | +09:11:19.5 | HIP 35227 | 14.06 |
| 2026-05-23 00:00 | 07:16:38.87 | +09:11:14.2 | HIP 35227 | 10.85 |
| 2026-05-23 12:00 | 07:17:06.26 | +09:11:08.1 | HIP 35310 | 10.22 |
| 2026-05-24 00:00 | 07:17:33.71 | +09:11:01.1 | HIP 35310 | 6.63 |
| 2026-05-24 12:00 | 07:18:01.24 | +09:10:53.4 | HIP 35310 | 8.70 |
| 2026-05-25 00:00 | 07:18:28.82 | +09:10:44.8 | HIP 35310 | 14.15 |
| 2026-05-25 12:00 | 07:18:56.48 | +09:10:35.3 | HIP 35519 | 14.47 |
| 2026-05-26 00:00 | 07:19:24.19 | +09:10:25.1 | HIP 35519 | 8.02 |
| 2026-05-26 12:00 | 07:19:51.97 | +09:10:14.0 | HIP 35519 | 3.57 |
| 2026-05-27 00:00 | 07:20:19.81 | +09:10:02.1 | HIP 35519 | 7.46 |
| 2026-05-27 12:00 | 07:20:47.72 | +09:09:49.4 | HIP 35519 | 13.91 |
| 2026-05-28 00:00 | 07:21:15.68 | +09:09:35.8 | HIP 35519 | 20.67 |
| 2026-05-28 12:00 | 07:21:43.71 | +09:09:21.4 | HIP 35750 | 18.52 |
| 2026-05-29 00:00 | 07:22:11.79 | +09:09:06.2 | HIP 35750 | 15.38 |
| 2026-05-29 12:00 | 07:22:39.94 | +09:08:50.2 | HIP 35750 | 15.03 |
| 2026-05-30 00:00 | 07:23:08.14 | +09:08:33.3 | HIP 35750 | 17.67 |
| 2026-05-30 12:00 | 07:23:36.39 | +09:08:15.7 | HIP 35915 | 17.13 |
| 2026-05-31 00:00 | 07:24:04.71 | +09:07:57.2 | HIP 35915 | 14.27 |
| 2026-05-31 12:00 | 07:24:33.07 | +09:07:37.9 | HIP 35915 | 14.55 |
| 2026-06-01 00:00 | 07:25:01.50 | +09:07:17.7 | HIP 36041 | 13.08 |
| 2026-06-01 12:00 | 07:25:29.97 | +09:06:56.8 | HIP 36041 | 9.87 |
| 2026-06-02 00:00 | 07:25:58.50 | +09:06:35.0 | HIP 36041 | 11.09 |