메타데이터
| 항목 |
값 |
| Designation |
C/2023 X1 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-10-18T02:08:14.887680Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:53Z |
| Obs used |
255 |
| NEO |
- |
| M1 |
17.400 |
| K1 |
7.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-12-04T10:33:40.492800Z |
| Discovery magnitude (MPC) |
17.38 G |
| Discovery observatory (MPC) |
703 · University of Arizona Catalina Sky Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-12-12.0000000 |
| e |
0.99415118 |
| q (au) |
0.950488 |
| a (au) |
162.509349 |
| i (deg) |
110.586652 |
| Ω (om, deg) |
137.010668 |
| ω (w, deg) |
321.470854 |
| M (ma, deg) |
0.026124 |
밝기
산란 + 전체 선형
$$
M_a = (16.820 + 3.581\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.820 |
| n |
3.581 |
| gf |
0.997 |
| gb |
-1.000 |
| k |
0.951 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-11-02 |
2025-08-30 |
-5.8110 |
+0.399 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
21:13:47.96 |
+61:00:56.5 |
HIP 104723 |
20.44 |
| 2026-09-20 12:00 |
21:13:31.53 |
+60:58:26.8 |
HIP 104723 |
17.44 |
| 2026-09-21 00:00 |
21:13:15.28 |
+60:55:56.2 |
HIP 104723 |
14.51 |
| 2026-09-21 12:00 |
21:12:59.21 |
+60:53:24.5 |
HIP 104723 |
11.71 |
| 2026-09-22 00:00 |
21:12:43.33 |
+60:50:51.7 |
HIP 104723 |
9.15 |
| 2026-09-22 12:00 |
21:12:27.63 |
+60:48:17.9 |
HIP 104723 |
7.11 |
| 2026-09-23 00:00 |
21:12:12.11 |
+60:45:43.2 |
HIP 104723 |
6.12 |
| 2026-09-23 12:00 |
21:11:56.78 |
+60:43:07.4 |
HIP 104723 |
6.67 |
| 2026-09-24 00:00 |
21:11:41.64 |
+60:40:30.7 |
HIP 104723 |
8.48 |
| 2026-09-24 12:00 |
21:11:26.68 |
+60:37:53.1 |
HIP 104723 |
10.93 |
| 2026-09-25 00:00 |
21:11:11.92 |
+60:35:14.5 |
HIP 104723 |
13.69 |
| 2026-09-25 12:00 |
21:10:57.34 |
+60:32:34.9 |
HIP 104723 |
16.60 |
| 2026-09-26 00:00 |
21:10:42.95 |
+60:29:54.5 |
HIP 104567 |
16.73 |
| 2026-09-26 12:00 |
21:10:28.75 |
+60:27:13.1 |
HIP 104567 |
14.40 |
| 2026-09-27 00:00 |
21:10:14.74 |
+60:24:30.9 |
HIP 104567 |
12.44 |
| 2026-09-27 12:00 |
21:10:00.92 |
+60:21:47.8 |
HIP 104567 |
11.05 |
| 2026-09-28 00:00 |
21:09:47.29 |
+60:19:03.9 |
HIP 104567 |
10.47 |
| 2026-09-28 12:00 |
21:09:33.85 |
+60:16:19.1 |
HIP 104567 |
10.84 |
| 2026-09-29 00:00 |
21:09:20.61 |
+60:13:33.5 |
HIP 104567 |
12.05 |
| 2026-09-29 12:00 |
21:09:07.56 |
+60:10:47.1 |
HIP 104567 |
13.90 |
| 2026-09-30 00:00 |
21:08:54.70 |
+60:07:59.9 |
HIP 104567 |
16.17 |
| 2026-09-30 12:00 |
21:08:42.03 |
+60:05:11.9 |
HIP 104223 |
17.86 |
| 2026-10-01 00:00 |
21:08:29.56 |
+60:02:23.2 |
HIP 104223 |
14.87 |
| 2026-10-01 12:00 |
21:08:17.29 |
+59:59:33.7 |
HIP 104223 |
12.02 |
| 2026-10-02 00:00 |
21:08:05.21 |
+59:56:43.4 |
HIP 104223 |
9.42 |
| 2026-10-02 12:00 |
21:07:53.32 |
+59:53:52.5 |
HIP 104223 |
7.34 |
| 2026-10-03 00:00 |
21:07:41.63 |
+59:51:00.8 |
HIP 104223 |
6.32 |
| 2026-10-03 12:00 |
21:07:30.13 |
+59:48:08.4 |
HIP 104223 |
6.86 |
| 2026-10-04 00:00 |
21:07:18.84 |
+59:45:15.4 |
HIP 104223 |
8.67 |
| 2026-10-04 12:00 |
21:07:07.73 |
+59:42:21.7 |
HIP 104223 |
11.14 |
| 2026-10-05 00:00 |
21:06:56.83 |
+59:39:27.4 |
HIP 104176 |
13.70 |
| 2026-10-05 12:00 |
21:06:46.12 |
+59:36:32.4 |
HIP 104176 |
10.52 |
| 2026-10-06 00:00 |
21:06:35.61 |
+59:33:36.8 |
HIP 104176 |
7.37 |
| 2026-10-06 12:00 |
21:06:25.30 |
+59:30:40.6 |
HIP 104176 |
4.32 |
| 2026-10-07 00:00 |
21:06:15.18 |
+59:27:43.9 |
HIP 104176 |
1.88 |
| 2026-10-07 12:00 |
21:06:05.27 |
+59:24:46.5 |
HIP 104176 |
3.00 |
| 2026-10-08 00:00 |
21:05:55.55 |
+59:21:48.7 |
HIP 104176 |
5.91 |
| 2026-10-08 12:00 |
21:05:46.03 |
+59:18:50.3 |
HIP 104176 |
9.03 |
| 2026-10-09 00:00 |
21:05:36.70 |
+59:15:51.3 |
HIP 104176 |
12.19 |
| 2026-10-09 12:00 |
21:05:27.58 |
+59:12:51.9 |
HIP 104021 |
11.48 |
| 2026-10-10 00:00 |
21:05:18.65 |
+59:09:52.0 |
HIP 104021 |
8.57 |
| 2026-10-10 12:00 |
21:05:09.93 |
+59:06:51.6 |
HIP 104021 |
5.99 |
| 2026-10-11 00:00 |
21:05:01.40 |
+59:03:50.8 |
HIP 104021 |
4.38 |