| Parameter |
Value |
| Designation |
256P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-03-17T12:37:58.005120Z |
| Orbit solution date (soln_date, UTC) |
2024-05-30T01:12:33Z |
| Obs used |
270 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
13.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-02-12.0000000 |
| e |
0.41935612 |
| q (au) |
2.689114 |
| a (au) |
4.631263 |
| i (deg) |
27.631658 |
| Ω (om, deg) |
81.436538 |
| ω (w, deg) |
124.120383 |
| M (ma, deg) |
68.874689 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.702 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.702 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
01:20:03.17 |
-24:10:12.4 |
HIP 6244 |
0.73 |
| 2026-07-29 12:00 |
01:20:03.65 |
-24:12:24.6 |
HIP 6244 |
1.83 |
| 2026-07-30 00:00 |
01:20:03.96 |
-24:14:37.5 |
HIP 6244 |
4.00 |
| 2026-07-30 12:00 |
01:20:04.11 |
-24:16:51.1 |
HIP 6244 |
6.22 |
| 2026-07-31 00:00 |
01:20:04.08 |
-24:19:05.3 |
HIP 6244 |
8.46 |
| 2026-07-31 12:00 |
01:20:03.88 |
-24:21:20.2 |
HIP 6244 |
10.70 |
| 2026-08-01 00:00 |
01:20:03.50 |
-24:23:35.8 |
HIP 6244 |
12.97 |
| 2026-08-01 12:00 |
01:20:02.96 |
-24:25:52.0 |
HIP 6244 |
15.24 |
| 2026-08-02 00:00 |
01:20:02.24 |
-24:28:08.8 |
HIP 6244 |
17.52 |
| 2026-08-02 12:00 |
01:20:01.35 |
-24:30:26.2 |
HIP 6244 |
19.82 |
| 2026-08-03 00:00 |
01:20:00.28 |
-24:32:44.2 |
HIP 6244 |
22.13 |
| 2026-08-03 12:00 |
01:19:59.04 |
-24:35:02.7 |
HIP 6197 |
23.04 |
| 2026-08-04 00:00 |
01:19:57.63 |
-24:37:21.9 |
HIP 6197 |
20.73 |
| 2026-08-04 12:00 |
01:19:56.04 |
-24:39:41.6 |
HIP 6197 |
18.41 |
| 2026-08-05 00:00 |
01:19:54.28 |
-24:42:01.8 |
HIP 6197 |
16.08 |
| 2026-08-05 12:00 |
01:19:52.35 |
-24:44:22.5 |
HIP 6197 |
13.73 |
| 2026-08-06 00:00 |
01:19:50.24 |
-24:46:43.8 |
HIP 6197 |
11.39 |
| 2026-08-06 12:00 |
01:19:47.95 |
-24:49:05.5 |
HIP 6197 |
9.04 |
| 2026-08-07 00:00 |
01:19:45.49 |
-24:51:27.7 |
HIP 6197 |
6.72 |
| 2026-08-07 12:00 |
01:19:42.86 |
-24:53:50.4 |
HIP 6197 |
4.48 |
| 2026-08-08 00:00 |
01:19:40.04 |
-24:56:13.5 |
HIP 6197 |
2.62 |
| 2026-08-08 12:00 |
01:19:37.06 |
-24:58:37.1 |
HIP 6197 |
2.39 |
| 2026-08-09 00:00 |
01:19:33.90 |
-25:01:01.0 |
HIP 6197 |
4.11 |
| 2026-08-09 12:00 |
01:19:30.56 |
-25:03:25.4 |
HIP 6197 |
6.38 |
| 2026-08-10 00:00 |
01:19:27.05 |
-25:05:50.1 |
HIP 6197 |
8.79 |
| 2026-08-10 12:00 |
01:19:23.36 |
-25:08:15.2 |
HIP 6197 |
11.27 |
| 2026-08-11 00:00 |
01:19:19.50 |
-25:10:40.6 |
HIP 6111 |
11.83 |
| 2026-08-11 12:00 |
01:19:15.46 |
-25:13:06.3 |
HIP 6111 |
11.15 |
| 2026-08-12 00:00 |
01:19:11.25 |
-25:15:32.3 |
HIP 6111 |
11.01 |
| 2026-08-12 12:00 |
01:19:06.86 |
-25:17:58.6 |
HIP 6111 |
11.46 |
| 2026-08-13 00:00 |
01:19:02.30 |
-25:20:25.2 |
HIP 6111 |
12.44 |
| 2026-08-13 12:00 |
01:18:57.56 |
-25:22:52.0 |
HIP 6111 |
13.85 |
| 2026-08-14 00:00 |
01:18:52.65 |
-25:25:19.0 |
HIP 6111 |
15.58 |
| 2026-08-14 12:00 |
01:18:47.57 |
-25:27:46.2 |
HIP 6111 |
17.55 |
| 2026-08-15 00:00 |
01:18:42.31 |
-25:30:13.6 |
HIP 6111 |
19.69 |
| 2026-08-15 12:00 |
01:18:36.88 |
-25:32:41.2 |
HIP 6125 |
21.26 |
| 2026-08-16 00:00 |
01:18:31.28 |
-25:35:08.9 |
HIP 6125 |
18.85 |
| 2026-08-16 12:00 |
01:18:25.51 |
-25:37:36.7 |
HIP 6125 |
16.57 |
| 2026-08-17 00:00 |
01:18:19.56 |
-25:40:04.6 |
HIP 6125 |
14.47 |
| 2026-08-17 12:00 |
01:18:13.45 |
-25:42:32.6 |
HIP 6125 |
12.66 |
| 2026-08-18 00:00 |
01:18:07.16 |
-25:45:00.6 |
HIP 6125 |
11.30 |
| 2026-08-18 12:00 |
01:18:00.71 |
-25:47:28.7 |
HIP 6125 |
10.58 |
| 2026-08-19 00:00 |
01:17:54.08 |
-25:49:56.8 |
HIP 6125 |
10.64 |