메타데이터
| 항목 |
값 |
| Designation |
C/2024 X2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-07-07T21:14:06.633600Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:18Z |
| Obs used |
495 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
14.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-12-12T07:14:54.009600Z |
| Discovery magnitude (MPC) |
18.84 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-07-02.0000000 |
| e |
0.92730894 |
| q (au) |
3.676303 |
| a (au) |
50.574346 |
| i (deg) |
109.221283 |
| Ω (om, deg) |
122.522639 |
| ω (w, deg) |
315.782374 |
| M (ma, deg) |
359.983873 |
밝기
산란 + 전체 선형
$$
M_a = (5.435 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.435 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
07:23:22.63 |
+23:25:56.6 |
HIP 35842 |
29.24 |
| 2026-03-26 12:00 |
07:23:12.26 |
+23:30:31.1 |
HIP 35842 |
33.99 |
| 2026-03-27 00:00 |
07:23:02.20 |
+23:35:03.6 |
HIP 35774 |
29.20 |
| 2026-03-27 12:00 |
07:22:52.45 |
+23:39:34.0 |
HIP 35774 |
24.49 |
| 2026-03-28 00:00 |
07:22:43.00 |
+23:44:02.3 |
HIP 35774 |
19.97 |
| 2026-03-28 12:00 |
07:22:33.87 |
+23:48:28.6 |
HIP 35774 |
15.75 |
| 2026-03-29 00:00 |
07:22:25.04 |
+23:52:52.9 |
HIP 35774 |
12.06 |
| 2026-03-29 12:00 |
07:22:16.51 |
+23:57:15.2 |
HIP 35774 |
9.44 |
| 2026-03-30 00:00 |
07:22:08.29 |
+24:01:35.5 |
HIP 35774 |
8.81 |
| 2026-03-30 12:00 |
07:22:00.36 |
+24:05:53.8 |
HIP 35774 |
10.45 |
| 2026-03-31 00:00 |
07:21:52.74 |
+24:10:10.1 |
HIP 35774 |
13.51 |
| 2026-03-31 12:00 |
07:21:45.41 |
+24:14:24.5 |
HIP 35774 |
17.19 |
| 2026-04-01 00:00 |
07:21:38.38 |
+24:18:37.0 |
HIP 35774 |
21.15 |
| 2026-04-01 12:00 |
07:21:31.65 |
+24:22:47.6 |
HIP 35820 |
23.49 |
| 2026-04-02 00:00 |
07:21:25.20 |
+24:26:56.2 |
HIP 35820 |
25.47 |
| 2026-04-02 12:00 |
07:21:19.05 |
+24:31:03.1 |
HIP 35820 |
27.92 |
| 2026-04-03 00:00 |
07:21:13.19 |
+24:35:08.0 |
HIP 35617 |
25.04 |
| 2026-04-03 12:00 |
07:21:07.61 |
+24:39:11.1 |
HIP 35617 |
20.88 |
| 2026-04-04 00:00 |
07:21:02.32 |
+24:43:12.4 |
HIP 35617 |
16.78 |
| 2026-04-04 12:00 |
07:20:57.32 |
+24:47:11.9 |
HIP 35617 |
12.78 |
| 2026-04-05 00:00 |
07:20:52.59 |
+24:51:09.5 |
HIP 35617 |
8.93 |
| 2026-04-05 12:00 |
07:20:48.15 |
+24:55:05.4 |
HIP 35617 |
5.46 |
| 2026-04-06 00:00 |
07:20:43.99 |
+24:58:59.6 |
HIP 35617 |
3.54 |
| 2026-04-06 12:00 |
07:20:40.11 |
+25:02:52.0 |
HIP 35617 |
5.17 |
| 2026-04-07 00:00 |
07:20:36.50 |
+25:06:42.6 |
HIP 35617 |
8.45 |
| 2026-04-07 12:00 |
07:20:33.16 |
+25:10:31.6 |
HIP 35617 |
12.07 |
| 2026-04-08 00:00 |
07:20:30.10 |
+25:14:18.8 |
HIP 35666 |
14.20 |
| 2026-04-08 12:00 |
07:20:27.31 |
+25:18:04.4 |
HIP 35666 |
15.40 |
| 2026-04-09 00:00 |
07:20:24.80 |
+25:21:48.3 |
HIP 35666 |
17.30 |
| 2026-04-09 12:00 |
07:20:22.54 |
+25:25:30.5 |
HIP 35624 |
17.27 |
| 2026-04-10 00:00 |
07:20:20.56 |
+25:29:11.1 |
HIP 35624 |
14.58 |
| 2026-04-10 12:00 |
07:20:18.84 |
+25:32:50.1 |
HIP 35624 |
12.40 |
| 2026-04-11 00:00 |
07:20:17.38 |
+25:36:27.5 |
HIP 35624 |
10.98 |
| 2026-04-11 12:00 |
07:20:16.19 |
+25:40:03.3 |
HIP 35624 |
10.62 |
| 2026-04-12 00:00 |
07:20:15.25 |
+25:43:37.5 |
HIP 35624 |
11.38 |
| 2026-04-12 12:00 |
07:20:14.58 |
+25:47:10.1 |
HIP 35624 |
13.04 |
| 2026-04-13 00:00 |
07:20:14.16 |
+25:50:41.2 |
HIP 35624 |
15.29 |
| 2026-04-13 12:00 |
07:20:13.99 |
+25:54:10.8 |
HIP 35624 |
17.91 |
| 2026-04-14 00:00 |
07:20:14.08 |
+25:57:38.8 |
HIP 35435 |
17.84 |
| 2026-04-14 12:00 |
07:20:14.42 |
+26:01:05.3 |
HIP 35435 |
18.45 |
| 2026-04-15 00:00 |
07:20:15.01 |
+26:04:30.4 |
HIP 35664 |
18.18 |
| 2026-04-15 12:00 |
07:20:15.84 |
+26:07:53.9 |
HIP 35664 |
17.35 |
| 2026-04-16 00:00 |
07:20:16.93 |
+26:11:16.0 |
HIP 35664 |
17.11 |