| 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) |
| 2026-06-01 00:00 |
04:33:31.05 |
+15:43:28.5 |
HIP 21317 |
20.32 |
| 2026-06-01 12:00 |
04:33:49.52 |
+15:43:57.8 |
HIP 21317 |
17.56 |
| 2026-06-02 00:00 |
04:34:07.98 |
+15:44:26.9 |
HIP 21317 |
15.61 |
| 2026-06-02 12:00 |
04:34:26.43 |
+15:44:55.6 |
HIP 21317 |
14.80 |
| 2026-06-03 00:00 |
04:34:44.88 |
+15:45:24.0 |
HIP 21317 |
15.30 |
| 2026-06-03 12:00 |
04:35:03.32 |
+15:45:52.2 |
HIP 21317 |
16.99 |
| 2026-06-04 00:00 |
04:35:21.75 |
+15:46:20.0 |
HIP 21317 |
19.57 |
| 2026-06-04 12:00 |
04:35:40.18 |
+15:46:47.6 |
HIP 21474 |
15.51 |
| 2026-06-05 00:00 |
04:35:58.60 |
+15:47:14.8 |
HIP 21474 |
11.25 |
| 2026-06-05 12:00 |
04:36:17.01 |
+15:47:41.8 |
HIP 21474 |
7.23 |
| 2026-06-06 00:00 |
04:36:35.41 |
+15:48:08.5 |
HIP 21474 |
4.22 |
| 2026-06-06 12:00 |
04:36:53.79 |
+15:48:34.8 |
HIP 21474 |
4.78 |
| 2026-06-07 00:00 |
04:37:12.17 |
+15:49:00.9 |
HIP 21474 |
8.21 |
| 2026-06-07 12:00 |
04:37:30.54 |
+15:49:26.7 |
HIP 21474 |
12.30 |
| 2026-06-08 00:00 |
04:37:48.89 |
+15:49:52.1 |
HIP 21588 |
13.10 |
| 2026-06-08 12:00 |
04:38:07.24 |
+15:50:17.3 |
HIP 21588 |
11.73 |
| 2026-06-09 00:00 |
04:38:25.57 |
+15:50:42.1 |
HIP 21673 |
10.84 |
| 2026-06-09 12:00 |
04:38:43.88 |
+15:51:06.7 |
HIP 21673 |
6.84 |
| 2026-06-10 00:00 |
04:39:02.19 |
+15:51:30.9 |
HIP 21673 |
3.90 |
| 2026-06-10 12:00 |
04:39:20.47 |
+15:51:54.9 |
HIP 21683 |
3.31 |
| 2026-06-11 00:00 |
04:39:38.74 |
+15:52:18.5 |
HIP 21683 |
6.03 |
| 2026-06-11 12:00 |
04:39:57.00 |
+15:52:41.8 |
HIP 21683 |
10.04 |
| 2026-06-12 00:00 |
04:40:15.24 |
+15:53:04.8 |
HIP 21683 |
14.28 |
| 2026-06-12 12:00 |
04:40:33.46 |
+15:53:27.5 |
HIP 21683 |
18.59 |
| 2026-06-13 00:00 |
04:40:51.67 |
+15:53:49.9 |
HIP 21873 |
19.27 |
| 2026-06-13 12:00 |
04:41:09.85 |
+15:54:12.0 |
HIP 21873 |
14.95 |
| 2026-06-14 00:00 |
04:41:28.02 |
+15:54:33.7 |
HIP 21873 |
10.67 |
| 2026-06-14 12:00 |
04:41:46.17 |
+15:54:55.1 |
HIP 21873 |
6.55 |
| 2026-06-15 00:00 |
04:42:04.29 |
+15:55:16.2 |
HIP 21873 |
3.21 |
| 2026-06-15 12:00 |
04:42:22.40 |
+15:55:37.0 |
HIP 21873 |
3.99 |
| 2026-06-16 00:00 |
04:42:40.48 |
+15:55:57.5 |
HIP 21873 |
7.72 |
| 2026-06-16 12:00 |
04:42:58.54 |
+15:56:17.6 |
HIP 21873 |
11.88 |
| 2026-06-17 00:00 |
04:43:16.58 |
+15:56:37.5 |
HIP 22004 |
10.33 |
| 2026-06-17 12:00 |
04:43:34.59 |
+15:56:57.0 |
HIP 22004 |
7.88 |
| 2026-06-18 00:00 |
04:43:52.58 |
+15:57:16.2 |
HIP 22004 |
7.43 |
| 2026-06-18 12:00 |
04:44:10.54 |
+15:57:35.0 |
HIP 22004 |
9.26 |
| 2026-06-19 00:00 |
04:44:28.48 |
+15:57:53.6 |
HIP 22004 |
12.39 |
| 2026-06-19 12:00 |
04:44:46.39 |
+15:58:11.8 |
HIP 22004 |
16.08 |
| 2026-06-20 00:00 |
04:45:04.27 |
+15:58:29.7 |
HIP 22004 |
20.01 |
| 2026-06-20 12:00 |
04:45:22.13 |
+15:58:47.2 |
HIP 22004 |
24.06 |
| 2026-06-21 00:00 |
04:45:39.95 |
+15:59:04.5 |
HIP 22225 |
25.30 |
| 2026-06-21 12:00 |
04:45:57.75 |
+15:59:21.4 |
HIP 22225 |
22.47 |
| 2026-06-22 00:00 |
04:46:15.52 |
+15:59:38.0 |
HIP 22225 |
20.18 |