メタデータ
| 項目 |
値 |
| 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 |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| 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 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
05:22:06.52 |
+15:24:59.2 |
HIP 24958 |
24.03 |
| 2026-09-20 12:00 |
05:22:09.61 |
+15:24:24.7 |
HIP 24958 |
24.97 |
| 2026-09-21 00:00 |
05:22:12.58 |
+15:23:50.0 |
HIP 24958 |
25.88 |
| 2026-09-21 12:00 |
05:22:15.43 |
+15:23:15.2 |
HIP 24958 |
26.78 |
| 2026-09-22 00:00 |
05:22:18.15 |
+15:22:40.2 |
HIP 24958 |
27.65 |
| 2026-09-22 12:00 |
05:22:20.74 |
+15:22:05.1 |
HIP 24958 |
28.49 |
| 2026-09-23 00:00 |
05:22:23.21 |
+15:21:29.9 |
HIP 25013 |
28.99 |
| 2026-09-23 12:00 |
05:22:25.56 |
+15:20:54.5 |
HIP 25013 |
28.79 |
| 2026-09-24 00:00 |
05:22:27.78 |
+15:20:18.9 |
HIP 25013 |
28.59 |
| 2026-09-24 12:00 |
05:22:29.87 |
+15:19:43.3 |
HIP 25013 |
28.39 |
| 2026-09-25 00:00 |
05:22:31.84 |
+15:19:07.5 |
HIP 25013 |
28.19 |
| 2026-09-25 12:00 |
05:22:33.68 |
+15:18:31.5 |
HIP 25013 |
27.98 |
| 2026-09-26 00:00 |
05:22:35.40 |
+15:17:55.5 |
HIP 25013 |
27.78 |
| 2026-09-26 12:00 |
05:22:36.99 |
+15:17:19.2 |
HIP 25013 |
27.57 |
| 2026-09-27 00:00 |
05:22:38.46 |
+15:16:42.9 |
HIP 25013 |
27.36 |
| 2026-09-27 12:00 |
05:22:39.79 |
+15:16:06.5 |
HIP 25013 |
27.14 |
| 2026-09-28 00:00 |
05:22:41.01 |
+15:15:29.9 |
HIP 25013 |
26.91 |
| 2026-09-28 12:00 |
05:22:42.09 |
+15:14:53.2 |
HIP 25013 |
26.68 |
| 2026-09-29 00:00 |
05:22:43.05 |
+15:14:16.4 |
HIP 25013 |
26.43 |
| 2026-09-29 12:00 |
05:22:43.89 |
+15:13:39.5 |
HIP 25013 |
26.18 |
| 2026-09-30 00:00 |
05:22:44.59 |
+15:13:02.4 |
HIP 25013 |
25.91 |
| 2026-09-30 12:00 |
05:22:45.17 |
+15:12:25.3 |
HIP 25013 |
25.63 |
| 2026-10-01 00:00 |
05:22:45.62 |
+15:11:48.0 |
HIP 25013 |
25.34 |
| 2026-10-01 12:00 |
05:22:45.95 |
+15:11:10.6 |
HIP 25013 |
25.04 |
| 2026-10-02 00:00 |
05:22:46.15 |
+15:10:33.2 |
HIP 25013 |
24.72 |
| 2026-10-02 12:00 |
05:22:46.22 |
+15:09:55.6 |
HIP 25013 |
24.39 |
| 2026-10-03 00:00 |
05:22:46.16 |
+15:09:17.9 |
HIP 25013 |
24.04 |
| 2026-10-03 12:00 |
05:22:45.98 |
+15:08:40.2 |
HIP 25013 |
23.68 |
| 2026-10-04 00:00 |
05:22:45.67 |
+15:08:02.3 |
HIP 25013 |
23.29 |
| 2026-10-04 12:00 |
05:22:45.23 |
+15:07:24.3 |
HIP 25013 |
22.90 |
| 2026-10-05 00:00 |
05:22:44.66 |
+15:06:46.3 |
HIP 25013 |
22.48 |
| 2026-10-05 12:00 |
05:22:43.97 |
+15:06:08.2 |
HIP 25013 |
22.05 |
| 2026-10-06 00:00 |
05:22:43.14 |
+15:05:30.0 |
HIP 25013 |
21.61 |
| 2026-10-06 12:00 |
05:22:42.19 |
+15:04:51.7 |
HIP 25013 |
21.14 |
| 2026-10-07 00:00 |
05:22:41.12 |
+15:04:13.3 |
HIP 25013 |
20.66 |
| 2026-10-07 12:00 |
05:22:39.91 |
+15:03:34.9 |
HIP 25013 |
20.16 |
| 2026-10-08 00:00 |
05:22:38.58 |
+15:02:56.4 |
HIP 25013 |
19.64 |
| 2026-10-08 12:00 |
05:22:37.12 |
+15:02:17.8 |
HIP 25013 |
19.11 |
| 2026-10-09 00:00 |
05:22:35.54 |
+15:01:39.2 |
HIP 25013 |
18.56 |
| 2026-10-09 12:00 |
05:22:33.83 |
+15:01:00.5 |
HIP 25013 |
17.99 |
| 2026-10-10 00:00 |
05:22:31.99 |
+15:00:21.7 |
HIP 25013 |
17.41 |
| 2026-10-10 12:00 |
05:22:30.02 |
+14:59:42.9 |
HIP 25013 |
16.82 |
| 2026-10-11 00:00 |
05:22:27.93 |
+14:59:04.0 |
HIP 25013 |
16.21 |