메타데이터
| 항목 |
값 |
| Designation |
C/2023 X2 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-12-28T00:29:42.207360Z |
| Orbit solution date (soln_date, UTC) |
2026-08-13T11:42:14Z |
| Obs used |
612 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-12-04T08:26:50.467200Z |
| Discovery magnitude (MPC) |
19.74 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-04-08.0000000 |
| e |
1.00030424 |
| q (au) |
5.089168 |
| a (au) |
-16727.572273 |
| i (deg) |
76.985563 |
| Ω (om, deg) |
66.305647 |
| ω (w, deg) |
64.746024 |
| M (ma, deg) |
-0.000120 |
밝기
산란 + 전체 선형
$$
M_a = (8.897 + 5.084\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.897 |
| n |
5.084 |
| gf |
1.000 |
| gb |
-0.777 |
| k |
0.800 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
14:44:47.15 |
+57:37:02.8 |
HIP 72151 |
5.50 |
| 2026-09-20 12:00 |
14:45:20.98 |
+57:30:34.3 |
HIP 72151 |
6.73 |
| 2026-09-21 00:00 |
14:45:54.81 |
+57:24:07.0 |
HIP 72151 |
13.59 |
| 2026-09-21 12:00 |
14:46:28.64 |
+57:17:40.9 |
HIP 72371 |
11.73 |
| 2026-09-22 00:00 |
14:47:02.47 |
+57:11:16.1 |
HIP 72371 |
11.56 |
| 2026-09-22 12:00 |
14:47:36.30 |
+57:04:52.5 |
HIP 72371 |
15.90 |
| 2026-09-23 00:00 |
14:48:10.13 |
+56:58:30.2 |
HIP 72467 |
9.04 |
| 2026-09-23 12:00 |
14:48:43.97 |
+56:52:09.0 |
HIP 72467 |
3.49 |
| 2026-09-24 00:00 |
14:49:17.80 |
+56:45:49.2 |
HIP 72467 |
8.09 |
| 2026-09-24 12:00 |
14:49:51.63 |
+56:39:30.6 |
HIP 72467 |
15.53 |
| 2026-09-25 00:00 |
14:50:25.46 |
+56:33:13.3 |
HIP 72467 |
23.22 |
| 2026-09-25 12:00 |
14:50:59.29 |
+56:26:57.3 |
HIP 72389 |
30.03 |
| 2026-09-26 00:00 |
14:51:33.11 |
+56:20:42.5 |
HIP 72389 |
31.26 |
| 2026-09-26 12:00 |
14:52:06.94 |
+56:14:29.1 |
HIP 72768 |
29.97 |
| 2026-09-27 00:00 |
14:52:40.76 |
+56:08:17.0 |
HIP 72768 |
23.61 |
| 2026-09-27 12:00 |
14:53:14.58 |
+56:02:06.1 |
HIP 72768 |
18.42 |
| 2026-09-28 00:00 |
14:53:48.39 |
+55:55:56.6 |
HIP 72768 |
15.61 |
| 2026-09-28 12:00 |
14:54:22.21 |
+55:49:48.4 |
HIP 72768 |
16.41 |
| 2026-09-29 00:00 |
14:54:56.02 |
+55:43:41.6 |
HIP 72768 |
20.41 |
| 2026-09-29 12:00 |
14:55:29.82 |
+55:37:36.0 |
HIP 73183 |
23.58 |
| 2026-09-30 00:00 |
14:56:03.62 |
+55:31:31.8 |
HIP 73183 |
25.82 |
| 2026-09-30 12:00 |
14:56:37.42 |
+55:25:29.0 |
HIP 73352 |
28.23 |
| 2026-10-01 00:00 |
14:57:11.21 |
+55:19:27.6 |
HIP 73352 |
21.10 |
| 2026-10-01 12:00 |
14:57:44.99 |
+55:13:27.5 |
HIP 73352 |
14.56 |
| 2026-10-02 00:00 |
14:58:18.78 |
+55:07:28.8 |
HIP 73352 |
9.81 |
| 2026-10-02 12:00 |
14:58:52.55 |
+55:01:31.4 |
HIP 73352 |
9.90 |
| 2026-10-03 00:00 |
14:59:26.32 |
+54:55:35.5 |
HIP 73352 |
14.71 |
| 2026-10-03 12:00 |
15:00:00.09 |
+54:49:41.0 |
HIP 73352 |
21.23 |
| 2026-10-04 00:00 |
15:00:33.85 |
+54:43:47.9 |
HIP 73352 |
28.30 |
| 2026-10-04 12:00 |
15:01:07.60 |
+54:37:56.2 |
HIP 73352 |
35.59 |
| 2026-10-05 00:00 |
15:01:41.34 |
+54:32:05.9 |
HIP 73909 |
39.95 |
| 2026-10-05 12:00 |
15:02:15.08 |
+54:26:17.1 |
HIP 73909 |
35.78 |
| 2026-10-06 00:00 |
15:02:48.81 |
+54:20:29.8 |
HIP 73909 |
32.84 |
| 2026-10-06 12:00 |
15:03:22.53 |
+54:14:43.9 |
HIP 73909 |
31.46 |
| 2026-10-07 00:00 |
15:03:56.24 |
+54:08:59.4 |
HIP 73909 |
31.83 |
| 2026-10-07 12:00 |
15:04:29.95 |
+54:03:16.5 |
HIP 73875 |
24.85 |
| 2026-10-08 00:00 |
15:05:03.64 |
+53:57:35.0 |
HIP 73875 |
17.48 |
| 2026-10-08 12:00 |
15:05:37.33 |
+53:51:55.1 |
HIP 73875 |
10.40 |
| 2026-10-09 00:00 |
15:06:11.00 |
+53:46:16.6 |
HIP 73875 |
4.94 |
| 2026-10-09 12:00 |
15:06:44.66 |
+53:40:39.7 |
HIP 73875 |
7.34 |
| 2026-10-10 00:00 |
15:07:18.31 |
+53:35:04.3 |
HIP 73875 |
14.00 |
| 2026-10-10 12:00 |
15:07:51.95 |
+53:29:30.4 |
HIP 73956 |
13.92 |
| 2026-10-11 00:00 |
15:08:25.58 |
+53:23:58.0 |
HIP 74094 |
8.31 |