| Parameter |
Value |
| Designation |
265P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2003-09-05T19:24:38.289600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:10Z |
| Obs used |
539 |
| NEO |
- |
| M1 |
14.900 |
| K1 |
14.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2003-10-14.0000000 |
| e |
0.64602512 |
| q (au) |
1.505450 |
| a (au) |
4.252984 |
| i (deg) |
14.691189 |
| Ω (om, deg) |
344.711232 |
| ω (w, deg) |
32.720499 |
| M (ma, deg) |
4.291677 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.883 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.883 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-0.507 |
| 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) |
| 2026-06-01 00:00 |
12:54:40.78 |
-17:52:01.2 |
HIP 62954 |
14.05 |
| 2026-06-01 12:00 |
12:54:33.87 |
-17:50:48.2 |
HIP 62954 |
13.96 |
| 2026-06-02 00:00 |
12:54:27.10 |
-17:49:35.8 |
HIP 62954 |
14.18 |
| 2026-06-02 12:00 |
12:54:20.48 |
-17:48:23.9 |
HIP 62951 |
14.65 |
| 2026-06-03 00:00 |
12:54:14.00 |
-17:47:12.7 |
HIP 62951 |
15.32 |
| 2026-06-03 12:00 |
12:54:07.66 |
-17:46:02.1 |
HIP 62951 |
16.20 |
| 2026-06-04 00:00 |
12:54:01.47 |
-17:44:52.1 |
HIP 62951 |
17.24 |
| 2026-06-04 12:00 |
12:53:55.42 |
-17:43:42.8 |
HIP 62951 |
18.40 |
| 2026-06-05 00:00 |
12:53:49.52 |
-17:42:34.0 |
HIP 62951 |
19.66 |
| 2026-06-05 12:00 |
12:53:43.76 |
-17:41:26.0 |
HIP 62951 |
20.97 |
| 2026-06-06 00:00 |
12:53:38.14 |
-17:40:18.5 |
HIP 62951 |
22.34 |
| 2026-06-06 12:00 |
12:53:32.67 |
-17:39:11.7 |
HIP 62951 |
23.73 |
| 2026-06-07 00:00 |
12:53:27.35 |
-17:38:05.6 |
HIP 62951 |
25.14 |
| 2026-06-07 12:00 |
12:53:22.17 |
-17:37:00.2 |
HIP 62951 |
26.56 |
| 2026-06-08 00:00 |
12:53:17.13 |
-17:35:55.4 |
HIP 62951 |
27.99 |
| 2026-06-08 12:00 |
12:53:12.25 |
-17:34:51.3 |
HIP 62735 |
27.09 |
| 2026-06-09 00:00 |
12:53:07.51 |
-17:33:47.9 |
HIP 62735 |
26.00 |
| 2026-06-09 12:00 |
12:53:02.91 |
-17:32:45.2 |
HIP 62735 |
24.98 |
| 2026-06-10 00:00 |
12:52:58.47 |
-17:31:43.2 |
HIP 62735 |
24.06 |
| 2026-06-10 12:00 |
12:52:54.17 |
-17:30:42.0 |
HIP 62735 |
23.22 |
| 2026-06-11 00:00 |
12:52:50.02 |
-17:29:41.4 |
HIP 62735 |
22.48 |
| 2026-06-11 12:00 |
12:52:46.01 |
-17:28:41.6 |
HIP 62735 |
21.83 |
| 2026-06-12 00:00 |
12:52:42.16 |
-17:27:42.5 |
HIP 62735 |
21.29 |
| 2026-06-12 12:00 |
12:52:38.45 |
-17:26:44.2 |
HIP 62735 |
20.84 |
| 2026-06-13 00:00 |
12:52:34.89 |
-17:25:46.6 |
HIP 62735 |
20.49 |
| 2026-06-13 12:00 |
12:52:31.48 |
-17:24:49.7 |
HIP 62735 |
20.24 |
| 2026-06-14 00:00 |
12:52:28.21 |
-17:23:53.6 |
HIP 62735 |
20.09 |
| 2026-06-14 12:00 |
12:52:25.10 |
-17:22:58.3 |
HIP 62735 |
20.03 |
| 2026-06-15 00:00 |
12:52:22.13 |
-17:22:03.8 |
HIP 62735 |
20.06 |
| 2026-06-15 12:00 |
12:52:19.31 |
-17:21:10.0 |
HIP 62735 |
20.17 |
| 2026-06-16 00:00 |
12:52:16.64 |
-17:20:17.0 |
HIP 62735 |
20.36 |
| 2026-06-16 12:00 |
12:52:14.12 |
-17:19:24.8 |
HIP 62735 |
20.61 |
| 2026-06-17 00:00 |
12:52:11.75 |
-17:18:33.5 |
HIP 62735 |
20.93 |
| 2026-06-17 12:00 |
12:52:09.53 |
-17:17:42.9 |
HIP 62735 |
21.30 |
| 2026-06-18 00:00 |
12:52:07.45 |
-17:16:53.1 |
HIP 62735 |
21.72 |
| 2026-06-18 12:00 |
12:52:05.52 |
-17:16:04.1 |
HIP 62735 |
22.18 |
| 2026-06-19 00:00 |
12:52:03.74 |
-17:15:15.9 |
HIP 62735 |
22.67 |
| 2026-06-19 12:00 |
12:52:02.11 |
-17:14:28.5 |
HIP 62735 |
23.19 |
| 2026-06-20 00:00 |
12:52:00.63 |
-17:13:42.0 |
HIP 62735 |
23.73 |
| 2026-06-20 12:00 |
12:51:59.29 |
-17:12:56.3 |
HIP 62735 |
24.30 |
| 2026-06-21 00:00 |
12:51:58.10 |
-17:12:11.4 |
HIP 62735 |
24.87 |
| 2026-06-21 12:00 |
12:51:57.05 |
-17:11:27.3 |
HIP 62735 |
25.47 |
| 2026-06-22 00:00 |
12:51:56.16 |
-17:10:44.1 |
HIP 62735 |
26.06 |