| 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) |
| 2026-09-20 00:00 |
05:36:30.63 |
-65:47:25.8 |
HIP 26026 |
22.53 |
| 2026-09-20 12:00 |
05:36:29.69 |
-65:48:26.2 |
HIP 26026 |
22.05 |
| 2026-09-21 00:00 |
05:36:28.67 |
-65:49:26.7 |
HIP 26026 |
21.59 |
| 2026-09-21 12:00 |
05:36:27.56 |
-65:50:27.0 |
HIP 26026 |
21.17 |
| 2026-09-22 00:00 |
05:36:26.38 |
-65:51:27.4 |
HIP 26026 |
20.78 |
| 2026-09-22 12:00 |
05:36:25.11 |
-65:52:27.6 |
HIP 26026 |
20.42 |
| 2026-09-23 00:00 |
05:36:23.77 |
-65:53:27.9 |
HIP 26026 |
20.10 |
| 2026-09-23 12:00 |
05:36:22.34 |
-65:54:28.1 |
HIP 26026 |
19.82 |
| 2026-09-24 00:00 |
05:36:20.83 |
-65:55:28.2 |
HIP 26026 |
19.58 |
| 2026-09-24 12:00 |
05:36:19.24 |
-65:56:28.3 |
HIP 26026 |
19.39 |
| 2026-09-25 00:00 |
05:36:17.57 |
-65:57:28.3 |
HIP 26026 |
19.23 |
| 2026-09-25 12:00 |
05:36:15.82 |
-65:58:28.2 |
HIP 26324 |
18.96 |
| 2026-09-26 00:00 |
05:36:13.98 |
-65:59:28.0 |
HIP 26324 |
17.97 |
| 2026-09-26 12:00 |
05:36:12.07 |
-66:00:27.8 |
HIP 26324 |
16.99 |
| 2026-09-27 00:00 |
05:36:10.07 |
-66:01:27.5 |
HIP 26324 |
16.01 |
| 2026-09-27 12:00 |
05:36:07.99 |
-66:02:27.1 |
HIP 26324 |
15.04 |
| 2026-09-28 00:00 |
05:36:05.83 |
-66:03:26.6 |
HIP 26324 |
14.08 |
| 2026-09-28 12:00 |
05:36:03.59 |
-66:04:26.1 |
HIP 26324 |
13.12 |
| 2026-09-29 00:00 |
05:36:01.26 |
-66:05:25.4 |
HIP 26324 |
12.19 |
| 2026-09-29 12:00 |
05:35:58.86 |
-66:06:24.6 |
HIP 26324 |
11.26 |
| 2026-09-30 00:00 |
05:35:56.37 |
-66:07:23.7 |
HIP 26324 |
10.36 |
| 2026-09-30 12:00 |
05:35:53.80 |
-66:08:22.8 |
HIP 26324 |
9.49 |
| 2026-10-01 00:00 |
05:35:51.15 |
-66:09:21.7 |
HIP 26324 |
8.65 |
| 2026-10-01 12:00 |
05:35:48.42 |
-66:10:20.4 |
HIP 26324 |
7.86 |
| 2026-10-02 00:00 |
05:35:45.60 |
-66:11:19.1 |
HIP 26324 |
7.14 |
| 2026-10-02 12:00 |
05:35:42.70 |
-66:12:17.6 |
HIP 26324 |
6.50 |
| 2026-10-03 00:00 |
05:35:39.72 |
-66:13:16.0 |
HIP 26324 |
5.97 |
| 2026-10-03 12:00 |
05:35:36.66 |
-66:14:14.3 |
HIP 26324 |
5.59 |
| 2026-10-04 00:00 |
05:35:33.51 |
-66:15:12.4 |
HIP 26324 |
5.39 |
| 2026-10-04 12:00 |
05:35:30.29 |
-66:16:10.3 |
HIP 26324 |
5.38 |
| 2026-10-05 00:00 |
05:35:26.98 |
-66:17:08.2 |
HIP 26324 |
5.57 |
| 2026-10-05 12:00 |
05:35:23.58 |
-66:18:05.8 |
HIP 26324 |
5.94 |
| 2026-10-06 00:00 |
05:35:20.11 |
-66:19:03.3 |
HIP 26324 |
6.46 |
| 2026-10-06 12:00 |
05:35:16.55 |
-66:20:00.7 |
HIP 26324 |
7.10 |
| 2026-10-07 00:00 |
05:35:12.91 |
-66:20:57.8 |
HIP 26324 |
7.82 |
| 2026-10-07 12:00 |
05:35:09.19 |
-66:21:54.8 |
HIP 26324 |
8.61 |
| 2026-10-08 00:00 |
05:35:05.39 |
-66:22:51.7 |
HIP 26324 |
9.44 |
| 2026-10-08 12:00 |
05:35:01.51 |
-66:23:48.3 |
HIP 26324 |
10.32 |
| 2026-10-09 00:00 |
05:34:57.54 |
-66:24:44.8 |
HIP 26324 |
11.22 |
| 2026-10-09 12:00 |
05:34:53.49 |
-66:25:41.0 |
HIP 26324 |
12.15 |
| 2026-10-10 00:00 |
05:34:49.36 |
-66:26:37.1 |
HIP 26324 |
13.09 |
| 2026-10-10 12:00 |
05:34:45.15 |
-66:27:32.9 |
HIP 26324 |
14.05 |
| 2026-10-11 00:00 |
05:34:40.86 |
-66:28:28.6 |
HIP 26368 |
14.32 |