| Parameter |
Value |
| Designation |
C/2011 UF305 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-07-22T03:58:11.043840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:57Z |
| Obs used |
2274 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
15.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-09-24.0000000 |
| e |
1.00067410 |
| q (au) |
2.138212 |
| a (au) |
-3171.934164 |
| i (deg) |
93.960744 |
| Ω (om, deg) |
297.435869 |
| ω (w, deg) |
121.994483 |
| M (ma, deg) |
0.000352 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.016 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.016 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.501 |
| 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 |
05:31:23.27 |
-64:11:12.4 |
HIP 25879 |
5.54 |
| 2026-07-29 12:00 |
05:31:29.29 |
-64:11:54.5 |
HIP 25879 |
6.22 |
| 2026-07-30 00:00 |
05:31:35.27 |
-64:12:37.0 |
HIP 25879 |
6.97 |
| 2026-07-30 12:00 |
05:31:41.21 |
-64:13:19.8 |
HIP 25879 |
7.78 |
| 2026-07-31 00:00 |
05:31:47.10 |
-64:14:03.0 |
HIP 26001 |
7.88 |
| 2026-07-31 12:00 |
05:31:52.94 |
-64:14:46.4 |
HIP 26001 |
7.32 |
| 2026-08-01 00:00 |
05:31:58.73 |
-64:15:30.2 |
HIP 26001 |
6.86 |
| 2026-08-01 12:00 |
05:32:04.48 |
-64:16:14.3 |
HIP 26001 |
6.51 |
| 2026-08-02 00:00 |
05:32:10.18 |
-64:16:58.8 |
HIP 26001 |
6.31 |
| 2026-08-02 12:00 |
05:32:15.83 |
-64:17:43.5 |
HIP 26001 |
6.25 |
| 2026-08-03 00:00 |
05:32:21.44 |
-64:18:28.6 |
HIP 26001 |
6.35 |
| 2026-08-03 12:00 |
05:32:26.99 |
-64:19:14.0 |
HIP 26001 |
6.60 |
| 2026-08-04 00:00 |
05:32:32.50 |
-64:19:59.7 |
HIP 26001 |
6.99 |
| 2026-08-04 12:00 |
05:32:37.95 |
-64:20:45.7 |
HIP 26056 |
6.91 |
| 2026-08-05 00:00 |
05:32:43.36 |
-64:21:32.0 |
HIP 26056 |
5.97 |
| 2026-08-05 12:00 |
05:32:48.71 |
-64:22:18.6 |
HIP 26056 |
5.05 |
| 2026-08-06 00:00 |
05:32:54.01 |
-64:23:05.6 |
HIP 26056 |
4.15 |
| 2026-08-06 12:00 |
05:32:59.26 |
-64:23:52.8 |
HIP 26056 |
3.30 |
| 2026-08-07 00:00 |
05:33:04.46 |
-64:24:40.3 |
HIP 26056 |
2.54 |
| 2026-08-07 12:00 |
05:33:09.61 |
-64:25:28.2 |
HIP 26056 |
1.98 |
| 2026-08-08 00:00 |
05:33:14.70 |
-64:26:16.3 |
HIP 26056 |
1.82 |
| 2026-08-08 12:00 |
05:33:19.74 |
-64:27:04.7 |
HIP 26056 |
2.15 |
| 2026-08-09 00:00 |
05:33:24.72 |
-64:27:53.4 |
HIP 26056 |
2.81 |
| 2026-08-09 12:00 |
05:33:29.65 |
-64:28:42.3 |
HIP 26056 |
3.61 |
| 2026-08-10 00:00 |
05:33:34.52 |
-64:29:31.6 |
HIP 26056 |
4.49 |
| 2026-08-10 12:00 |
05:33:39.34 |
-64:30:21.1 |
HIP 26056 |
5.40 |
| 2026-08-11 00:00 |
05:33:44.11 |
-64:31:11.0 |
HIP 26056 |
6.33 |
| 2026-08-11 12:00 |
05:33:48.81 |
-64:32:01.0 |
HIP 26056 |
7.28 |
| 2026-08-12 00:00 |
05:33:53.46 |
-64:32:51.4 |
HIP 26056 |
8.24 |
| 2026-08-12 12:00 |
05:33:58.05 |
-64:33:42.0 |
HIP 26056 |
9.20 |
| 2026-08-13 00:00 |
05:34:02.59 |
-64:34:32.9 |
HIP 26056 |
10.17 |
| 2026-08-13 12:00 |
05:34:07.06 |
-64:35:24.0 |
HIP 26056 |
11.14 |
| 2026-08-14 00:00 |
05:34:11.48 |
-64:36:15.5 |
HIP 26056 |
12.11 |
| 2026-08-14 12:00 |
05:34:15.83 |
-64:37:07.1 |
HIP 26056 |
13.09 |
| 2026-08-15 00:00 |
05:34:20.13 |
-64:37:59.0 |
HIP 26056 |
14.06 |
| 2026-08-15 12:00 |
05:34:24.37 |
-64:38:51.2 |
HIP 26056 |
15.04 |
| 2026-08-16 00:00 |
05:34:28.55 |
-64:39:43.6 |
HIP 26056 |
16.02 |
| 2026-08-16 12:00 |
05:34:32.66 |
-64:40:36.2 |
HIP 26056 |
17.00 |
| 2026-08-17 00:00 |
05:34:36.72 |
-64:41:29.1 |
HIP 26056 |
17.98 |
| 2026-08-17 12:00 |
05:34:40.71 |
-64:42:22.2 |
HIP 26056 |
18.96 |
| 2026-08-18 00:00 |
05:34:44.64 |
-64:43:15.5 |
HIP 26056 |
19.95 |
| 2026-08-18 12:00 |
05:34:48.51 |
-64:44:09.0 |
HIP 26030 |
19.96 |
| 2026-08-19 00:00 |
05:34:52.32 |
-64:45:02.8 |
HIP 26030 |
19.41 |