| 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) |
| 2026-03-26 00:00 |
19:49:43.17 |
-42:24:08.2 |
HIP 97714 |
20.23 |
| 2026-03-26 12:00 |
19:49:44.73 |
-42:24:19.8 |
HIP 97714 |
19.90 |
| 2026-03-27 00:00 |
19:49:46.26 |
-42:24:31.5 |
HIP 97714 |
19.58 |
| 2026-03-27 12:00 |
19:49:47.76 |
-42:24:43.4 |
HIP 97714 |
19.26 |
| 2026-03-28 00:00 |
19:49:49.22 |
-42:24:55.3 |
HIP 97714 |
18.95 |
| 2026-03-28 12:00 |
19:49:50.66 |
-42:25:07.4 |
HIP 97714 |
18.65 |
| 2026-03-29 00:00 |
19:49:52.07 |
-42:25:19.5 |
HIP 97714 |
18.35 |
| 2026-03-29 12:00 |
19:49:53.44 |
-42:25:31.8 |
HIP 97714 |
18.06 |
| 2026-03-30 00:00 |
19:49:54.79 |
-42:25:44.2 |
HIP 97714 |
17.78 |
| 2026-03-30 12:00 |
19:49:56.10 |
-42:25:56.7 |
HIP 97714 |
17.50 |
| 2026-03-31 00:00 |
19:49:57.38 |
-42:26:09.2 |
HIP 97714 |
17.23 |
| 2026-03-31 12:00 |
19:49:58.63 |
-42:26:21.9 |
HIP 97714 |
16.97 |
| 2026-04-01 00:00 |
19:49:59.85 |
-42:26:34.7 |
HIP 97714 |
16.71 |
| 2026-04-01 12:00 |
19:50:01.03 |
-42:26:47.5 |
HIP 97714 |
16.46 |
| 2026-04-02 00:00 |
19:50:02.19 |
-42:27:00.5 |
HIP 97714 |
16.22 |
| 2026-04-02 12:00 |
19:50:03.31 |
-42:27:13.6 |
HIP 97714 |
15.99 |
| 2026-04-03 00:00 |
19:50:04.40 |
-42:27:26.7 |
HIP 97714 |
15.76 |
| 2026-04-03 12:00 |
19:50:05.46 |
-42:27:40.0 |
HIP 97714 |
15.54 |
| 2026-04-04 00:00 |
19:50:06.49 |
-42:27:53.4 |
HIP 97714 |
15.34 |
| 2026-04-04 12:00 |
19:50:07.48 |
-42:28:06.8 |
HIP 97714 |
15.13 |
| 2026-04-05 00:00 |
19:50:08.44 |
-42:28:20.3 |
HIP 97714 |
14.94 |
| 2026-04-05 12:00 |
19:50:09.37 |
-42:28:34.0 |
HIP 97714 |
14.76 |
| 2026-04-06 00:00 |
19:50:10.27 |
-42:28:47.7 |
HIP 97714 |
14.59 |
| 2026-04-06 12:00 |
19:50:11.14 |
-42:29:01.5 |
HIP 97714 |
14.42 |
| 2026-04-07 00:00 |
19:50:11.97 |
-42:29:15.4 |
HIP 97714 |
14.27 |
| 2026-04-07 12:00 |
19:50:12.77 |
-42:29:29.4 |
HIP 97714 |
14.12 |
| 2026-04-08 00:00 |
19:50:13.54 |
-42:29:43.5 |
HIP 97714 |
13.99 |
| 2026-04-08 12:00 |
19:50:14.28 |
-42:29:57.7 |
HIP 97714 |
13.86 |
| 2026-04-09 00:00 |
19:50:14.98 |
-42:30:11.9 |
HIP 97714 |
13.75 |
| 2026-04-09 12:00 |
19:50:15.65 |
-42:30:26.2 |
HIP 97714 |
13.65 |
| 2026-04-10 00:00 |
19:50:16.29 |
-42:30:40.7 |
HIP 97714 |
13.55 |
| 2026-04-10 12:00 |
19:50:16.89 |
-42:30:55.2 |
HIP 97714 |
13.47 |
| 2026-04-11 00:00 |
19:50:17.46 |
-42:31:09.8 |
HIP 97714 |
13.40 |
| 2026-04-11 12:00 |
19:50:18.00 |
-42:31:24.4 |
HIP 97714 |
13.34 |
| 2026-04-12 00:00 |
19:50:18.51 |
-42:31:39.2 |
HIP 97714 |
13.29 |
| 2026-04-12 12:00 |
19:50:18.98 |
-42:31:54.0 |
HIP 97714 |
13.25 |
| 2026-04-13 00:00 |
19:50:19.42 |
-42:32:08.9 |
HIP 97714 |
13.23 |
| 2026-04-13 12:00 |
19:50:19.83 |
-42:32:23.9 |
HIP 97714 |
13.21 |
| 2026-04-14 00:00 |
19:50:20.20 |
-42:32:38.9 |
HIP 97714 |
13.21 |
| 2026-04-14 12:00 |
19:50:20.54 |
-42:32:54.0 |
HIP 97714 |
13.22 |
| 2026-04-15 00:00 |
19:50:20.85 |
-42:33:09.2 |
HIP 97714 |
13.24 |
| 2026-04-15 12:00 |
19:50:21.12 |
-42:33:24.5 |
HIP 97714 |
13.27 |
| 2026-04-16 00:00 |
19:50:21.36 |
-42:33:39.8 |
HIP 97714 |
13.31 |