C/2023 RN3 (ATLAS)
| Parameter |
Value |
| Designation |
C/2023 RN3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-01-18T00:08:18.320640Z |
| Orbit solution date (soln_date, UTC) |
2025-09-16T12:42:50Z |
| Obs used |
637 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
11.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-11-02.0000000 |
| e |
0.49041086 |
| q (au) |
5.172310 |
| a (au) |
10.149962 |
| i (deg) |
10.358010 |
| Ω (om, deg) |
207.067405 |
| ω (w, deg) |
130.302280 |
| M (ma, deg) |
8.777913 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-02-03 00:00 |
03:41:00.63 |
+13:00:59.8 |
HIP 17133 |
16.49 |
| 2026-02-03 12:00 |
03:41:03.16 |
+13:01:21.6 |
HIP 17133 |
16.72 |
| 2026-02-04 00:00 |
03:41:05.84 |
+13:01:44.0 |
HIP 17133 |
17.00 |
| 2026-02-04 12:00 |
03:41:08.64 |
+13:02:06.7 |
HIP 17133 |
17.34 |
| 2026-02-05 00:00 |
03:41:11.58 |
+13:02:30.0 |
HIP 17133 |
17.72 |
| 2026-02-05 12:00 |
03:41:14.65 |
+13:02:53.7 |
HIP 17133 |
18.16 |
| 2026-02-06 00:00 |
03:41:17.85 |
+13:03:17.9 |
HIP 17133 |
18.65 |
| 2026-02-06 12:00 |
03:41:21.19 |
+13:03:42.5 |
HIP 17133 |
19.19 |
| 2026-02-07 00:00 |
03:41:24.66 |
+13:04:07.6 |
HIP 17133 |
19.79 |
| 2026-02-07 12:00 |
03:41:28.25 |
+13:04:33.1 |
HIP 17133 |
20.44 |
| 2026-02-08 00:00 |
03:41:31.98 |
+13:04:59.0 |
HIP 17133 |
21.14 |
| 2026-02-08 12:00 |
03:41:35.84 |
+13:05:25.4 |
HIP 17133 |
21.90 |
| 2026-02-09 00:00 |
03:41:39.83 |
+13:05:52.3 |
HIP 17133 |
22.71 |
| 2026-02-09 12:00 |
03:41:43.96 |
+13:06:19.6 |
HIP 17133 |
23.56 |
| 2026-02-10 00:00 |
03:41:48.21 |
+13:06:47.3 |
HIP 17133 |
24.47 |
| 2026-02-10 12:00 |
03:41:52.59 |
+13:07:15.4 |
HIP 17238 |
24.80 |
| 2026-02-11 00:00 |
03:41:57.10 |
+13:07:43.9 |
HIP 17238 |
24.61 |
| 2026-02-11 12:00 |
03:42:01.74 |
+13:08:12.9 |
HIP 17238 |
24.48 |
| 2026-02-12 00:00 |
03:42:06.51 |
+13:08:42.3 |
HIP 17238 |
24.42 |
| 2026-02-12 12:00 |
03:42:11.41 |
+13:09:12.1 |
HIP 17238 |
24.43 |
| 2026-02-13 00:00 |
03:42:16.43 |
+13:09:42.3 |
HIP 17238 |
24.51 |
| 2026-02-13 12:00 |
03:42:21.58 |
+13:10:12.9 |
HIP 17238 |
24.68 |
| 2026-02-14 00:00 |
03:42:26.86 |
+13:10:43.9 |
HIP 17238 |
24.93 |
| 2026-02-14 12:00 |
03:42:32.27 |
+13:11:15.3 |
HIP 17238 |
25.27 |
| 2026-02-15 00:00 |
03:42:37.80 |
+13:11:47.1 |
HIP 17238 |
25.70 |
| 2026-02-15 12:00 |
03:42:43.46 |
+13:12:19.3 |
HIP 17379 |
26.09 |
| 2026-02-16 00:00 |
03:42:49.25 |
+13:12:51.9 |
HIP 17379 |
26.19 |
| 2026-02-16 12:00 |
03:42:55.16 |
+13:13:24.8 |
HIP 17379 |
26.37 |
| 2026-02-17 00:00 |
03:43:01.20 |
+13:13:58.1 |
HIP 17379 |
26.65 |
| 2026-02-17 12:00 |
03:43:07.36 |
+13:14:31.8 |
HIP 17379 |
27.02 |
| 2026-02-18 00:00 |
03:43:13.64 |
+13:15:05.9 |
HIP 17379 |
27.48 |
| 2026-02-18 12:00 |
03:43:20.05 |
+13:15:40.3 |
HIP 17379 |
28.04 |
| 2026-02-19 00:00 |
03:43:26.58 |
+13:16:15.0 |
HIP 17379 |
28.69 |
| 2026-02-19 12:00 |
03:43:33.23 |
+13:16:50.2 |
HIP 17379 |
29.43 |
| 2026-02-20 00:00 |
03:43:40.01 |
+13:17:25.6 |
HIP 17557 |
28.34 |
| 2026-02-20 12:00 |
03:43:46.91 |
+13:18:01.5 |
HIP 17557 |
26.74 |
| 2026-02-21 00:00 |
03:43:53.92 |
+13:18:37.6 |
HIP 17557 |
25.12 |
| 2026-02-21 12:00 |
03:44:01.06 |
+13:19:14.1 |
HIP 17557 |
23.51 |
| 2026-02-22 00:00 |
03:44:08.32 |
+13:19:50.9 |
HIP 17557 |
21.91 |
| 2026-02-22 12:00 |
03:44:15.69 |
+13:20:28.1 |
HIP 17557 |
20.33 |
| 2026-02-23 00:00 |
03:44:23.19 |
+13:21:05.5 |
HIP 17557 |
18.79 |
| 2026-02-23 12:00 |
03:44:30.80 |
+13:21:43.3 |
HIP 17557 |
17.29 |
| 2026-02-24 00:00 |
03:44:38.53 |
+13:22:21.4 |
HIP 17557 |
15.87 |