メタデータ
| 項目 |
値 |
| Designation |
C/1952 M1 (Peltier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1952-07-15T06:06:23.693760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:10Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
9.100 |
| K1 |
23.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1952-08-08.0000000 |
| e |
0.99975208 |
| q (au) |
1.201937 |
| a (au) |
4848.007632 |
| i (deg) |
45.552738 |
| Ω (om, deg) |
188.643743 |
| ω (w, deg) |
96.584082 |
| M (ma, deg) |
0.000069 |
等級
散乱 + 全体線形
$$
M_a = (8.443 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.443 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1952-07-15 |
1952-11-20 |
+11.5410 |
-1.417 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
06:02:38.67 |
-21:41:54.2 |
HIP 28687 |
12.08 |
| 2026-09-20 12:00 |
06:02:38.75 |
-21:42:07.1 |
HIP 28687 |
11.96 |
| 2026-09-21 00:00 |
06:02:38.82 |
-21:42:19.9 |
HIP 28687 |
11.85 |
| 2026-09-21 12:00 |
06:02:38.88 |
-21:42:32.8 |
HIP 28687 |
11.75 |
| 2026-09-22 00:00 |
06:02:38.93 |
-21:42:45.6 |
HIP 28687 |
11.65 |
| 2026-09-22 12:00 |
06:02:38.96 |
-21:42:58.5 |
HIP 28687 |
11.56 |
| 2026-09-23 00:00 |
06:02:38.99 |
-21:43:11.4 |
HIP 28687 |
11.48 |
| 2026-09-23 12:00 |
06:02:39.00 |
-21:43:24.2 |
HIP 28687 |
11.40 |
| 2026-09-24 00:00 |
06:02:39.01 |
-21:43:37.1 |
HIP 28687 |
11.32 |
| 2026-09-24 12:00 |
06:02:39.00 |
-21:43:50.0 |
HIP 28687 |
11.25 |
| 2026-09-25 00:00 |
06:02:38.98 |
-21:44:02.8 |
HIP 28687 |
11.19 |
| 2026-09-25 12:00 |
06:02:38.95 |
-21:44:15.7 |
HIP 28687 |
11.13 |
| 2026-09-26 00:00 |
06:02:38.91 |
-21:44:28.6 |
HIP 28687 |
11.08 |
| 2026-09-26 12:00 |
06:02:38.86 |
-21:44:41.5 |
HIP 28687 |
11.04 |
| 2026-09-27 00:00 |
06:02:38.79 |
-21:44:54.3 |
HIP 28687 |
11.00 |
| 2026-09-27 12:00 |
06:02:38.72 |
-21:45:07.2 |
HIP 28687 |
10.97 |
| 2026-09-28 00:00 |
06:02:38.63 |
-21:45:20.0 |
HIP 28687 |
10.95 |
| 2026-09-28 12:00 |
06:02:38.54 |
-21:45:32.9 |
HIP 28687 |
10.93 |
| 2026-09-29 00:00 |
06:02:38.43 |
-21:45:45.7 |
HIP 28687 |
10.93 |
| 2026-09-29 12:00 |
06:02:38.31 |
-21:45:58.5 |
HIP 28687 |
10.92 |
| 2026-09-30 00:00 |
06:02:38.18 |
-21:46:11.4 |
HIP 28687 |
10.93 |
| 2026-09-30 12:00 |
06:02:38.04 |
-21:46:24.2 |
HIP 28687 |
10.94 |
| 2026-10-01 00:00 |
06:02:37.89 |
-21:46:37.0 |
HIP 28687 |
10.95 |
| 2026-10-01 12:00 |
06:02:37.72 |
-21:46:49.8 |
HIP 28687 |
10.98 |
| 2026-10-02 00:00 |
06:02:37.55 |
-21:47:02.5 |
HIP 28687 |
11.01 |
| 2026-10-02 12:00 |
06:02:37.36 |
-21:47:15.3 |
HIP 28687 |
11.05 |
| 2026-10-03 00:00 |
06:02:37.17 |
-21:47:28.0 |
HIP 28687 |
11.09 |
| 2026-10-03 12:00 |
06:02:36.96 |
-21:47:40.8 |
HIP 28687 |
11.14 |
| 2026-10-04 00:00 |
06:02:36.74 |
-21:47:53.5 |
HIP 28687 |
11.20 |
| 2026-10-04 12:00 |
06:02:36.51 |
-21:48:06.2 |
HIP 28687 |
11.27 |
| 2026-10-05 00:00 |
06:02:36.27 |
-21:48:18.9 |
HIP 28687 |
11.34 |
| 2026-10-05 12:00 |
06:02:36.02 |
-21:48:31.5 |
HIP 28687 |
11.41 |
| 2026-10-06 00:00 |
06:02:35.76 |
-21:48:44.1 |
HIP 28687 |
11.50 |
| 2026-10-06 12:00 |
06:02:35.48 |
-21:48:56.8 |
HIP 28687 |
11.59 |
| 2026-10-07 00:00 |
06:02:35.20 |
-21:49:09.4 |
HIP 28687 |
11.68 |
| 2026-10-07 12:00 |
06:02:34.90 |
-21:49:21.9 |
HIP 28687 |
11.78 |
| 2026-10-08 00:00 |
06:02:34.59 |
-21:49:34.5 |
HIP 28687 |
11.89 |
| 2026-10-08 12:00 |
06:02:34.27 |
-21:49:47.0 |
HIP 28687 |
12.00 |
| 2026-10-09 00:00 |
06:02:33.94 |
-21:49:59.5 |
HIP 28687 |
12.12 |
| 2026-10-09 12:00 |
06:02:33.60 |
-21:50:12.0 |
HIP 28687 |
12.24 |
| 2026-10-10 00:00 |
06:02:33.25 |
-21:50:24.4 |
HIP 28687 |
12.37 |
| 2026-10-10 12:00 |
06:02:32.89 |
-21:50:36.8 |
HIP 28687 |
12.50 |
| 2026-10-11 00:00 |
06:02:32.51 |
-21:50:49.2 |
HIP 28687 |
12.64 |