| Parameter |
Value |
| Designation |
C/2004 RG113 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-03-03T17:13:10.678080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:43Z |
| Obs used |
414 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
8.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2005-02-11.0000000 |
| e |
0.99722336 |
| q (au) |
1.942358 |
| a (au) |
699.536709 |
| i (deg) |
21.618236 |
| Ω (om, deg) |
8.772958 |
| ω (w, deg) |
125.305509 |
| M (ma, deg) |
359.998896 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.533 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.533 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| 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 |
19:36:56.33 |
-43:10:07.5 |
HIP 96529 |
14.69 |
| 2026-09-20 12:00 |
19:36:54.90 |
-43:09:55.1 |
HIP 96529 |
14.61 |
| 2026-09-21 00:00 |
19:36:53.51 |
-43:09:42.7 |
HIP 96529 |
14.54 |
| 2026-09-21 12:00 |
19:36:52.15 |
-43:09:30.2 |
HIP 96529 |
14.46 |
| 2026-09-22 00:00 |
19:36:50.82 |
-43:09:17.5 |
HIP 96529 |
14.40 |
| 2026-09-22 12:00 |
19:36:49.52 |
-43:09:04.8 |
HIP 96529 |
14.33 |
| 2026-09-23 00:00 |
19:36:48.26 |
-43:08:52.0 |
HIP 96529 |
14.27 |
| 2026-09-23 12:00 |
19:36:47.02 |
-43:08:39.0 |
HIP 96529 |
14.20 |
| 2026-09-24 00:00 |
19:36:45.82 |
-43:08:26.0 |
HIP 96529 |
14.14 |
| 2026-09-24 12:00 |
19:36:44.64 |
-43:08:12.8 |
HIP 96529 |
14.09 |
| 2026-09-25 00:00 |
19:36:43.50 |
-43:07:59.6 |
HIP 96529 |
14.03 |
| 2026-09-25 12:00 |
19:36:42.40 |
-43:07:46.3 |
HIP 96529 |
13.98 |
| 2026-09-26 00:00 |
19:36:41.32 |
-43:07:32.9 |
HIP 96529 |
13.92 |
| 2026-09-26 12:00 |
19:36:40.27 |
-43:07:19.3 |
HIP 96529 |
13.87 |
| 2026-09-27 00:00 |
19:36:39.26 |
-43:07:05.7 |
HIP 96529 |
13.82 |
| 2026-09-27 12:00 |
19:36:38.28 |
-43:06:52.1 |
HIP 96529 |
13.77 |
| 2026-09-28 00:00 |
19:36:37.33 |
-43:06:38.3 |
HIP 96529 |
13.72 |
| 2026-09-28 12:00 |
19:36:36.41 |
-43:06:24.4 |
HIP 96529 |
13.68 |
| 2026-09-29 00:00 |
19:36:35.53 |
-43:06:10.4 |
HIP 96529 |
13.63 |
| 2026-09-29 12:00 |
19:36:34.68 |
-43:05:56.4 |
HIP 96529 |
13.58 |
| 2026-09-30 00:00 |
19:36:33.86 |
-43:05:42.2 |
HIP 96529 |
13.53 |
| 2026-09-30 12:00 |
19:36:33.07 |
-43:05:28.0 |
HIP 96529 |
13.49 |
| 2026-10-01 00:00 |
19:36:32.32 |
-43:05:13.7 |
HIP 96529 |
13.44 |
| 2026-10-01 12:00 |
19:36:31.60 |
-43:04:59.3 |
HIP 96529 |
13.39 |
| 2026-10-02 00:00 |
19:36:30.91 |
-43:04:44.9 |
HIP 96529 |
13.35 |
| 2026-10-02 12:00 |
19:36:30.25 |
-43:04:30.3 |
HIP 96529 |
13.30 |
| 2026-10-03 00:00 |
19:36:29.63 |
-43:04:15.7 |
HIP 96529 |
13.25 |
| 2026-10-03 12:00 |
19:36:29.04 |
-43:04:01.0 |
HIP 96529 |
13.21 |
| 2026-10-04 00:00 |
19:36:28.48 |
-43:03:46.2 |
HIP 96529 |
13.16 |
| 2026-10-04 12:00 |
19:36:27.95 |
-43:03:31.3 |
HIP 96529 |
13.11 |
| 2026-10-05 00:00 |
19:36:27.46 |
-43:03:16.4 |
HIP 96529 |
13.06 |
| 2026-10-05 12:00 |
19:36:27.00 |
-43:03:01.4 |
HIP 96529 |
13.01 |
| 2026-10-06 00:00 |
19:36:26.58 |
-43:02:46.3 |
HIP 96529 |
12.96 |
| 2026-10-06 12:00 |
19:36:26.19 |
-43:02:31.2 |
HIP 96529 |
12.91 |
| 2026-10-07 00:00 |
19:36:25.83 |
-43:02:15.9 |
HIP 96529 |
12.86 |
| 2026-10-07 12:00 |
19:36:25.50 |
-43:02:00.6 |
HIP 96529 |
12.80 |
| 2026-10-08 00:00 |
19:36:25.21 |
-43:01:45.3 |
HIP 96529 |
12.75 |
| 2026-10-08 12:00 |
19:36:24.95 |
-43:01:29.8 |
HIP 96529 |
12.69 |
| 2026-10-09 00:00 |
19:36:24.73 |
-43:01:14.3 |
HIP 96529 |
12.64 |
| 2026-10-09 12:00 |
19:36:24.54 |
-43:00:58.7 |
HIP 96529 |
12.58 |
| 2026-10-10 00:00 |
19:36:24.38 |
-43:00:43.1 |
HIP 96529 |
12.52 |
| 2026-10-10 12:00 |
19:36:24.25 |
-43:00:27.4 |
HIP 96529 |
12.46 |
| 2026-10-11 00:00 |
19:36:24.16 |
-43:00:11.7 |
HIP 96529 |
12.40 |