메타데이터
| 항목 |
값 |
| Designation |
C/2022 W2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-03-08T16:29:49.200000Z |
| Orbit solution date (soln_date, UTC) |
2024-03-12T13:12:41Z |
| Obs used |
250 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
17.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-11-24T05:40:11.481600Z |
| Discovery magnitude (MPC) |
19.14 o |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-01-17.0000000 |
| e |
0.99064934 |
| q (au) |
3.122791 |
| a (au) |
333.964717 |
| i (deg) |
63.532535 |
| Ω (om, deg) |
320.448256 |
| ω (w, deg) |
123.259626 |
| M (ma, deg) |
359.991814 |
밝기
산란 + 전체 선형
$$
M_a = (7.924 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.924 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-06-01 00:00 |
09:38:46.90 |
-38:16:22.8 |
HIP 47251 |
28.47 |
| 2026-06-01 12:00 |
09:38:52.05 |
-38:15:07.4 |
HIP 47251 |
27.72 |
| 2026-06-02 00:00 |
09:38:57.30 |
-38:13:52.8 |
HIP 47251 |
27.07 |
| 2026-06-02 12:00 |
09:39:02.65 |
-38:12:38.9 |
HIP 47251 |
26.52 |
| 2026-06-03 00:00 |
09:39:08.11 |
-38:11:25.8 |
HIP 47251 |
26.09 |
| 2026-06-03 12:00 |
09:39:13.66 |
-38:10:13.5 |
HIP 47251 |
25.77 |
| 2026-06-04 00:00 |
09:39:19.31 |
-38:09:02.0 |
HIP 47251 |
25.57 |
| 2026-06-04 12:00 |
09:39:25.05 |
-38:07:51.3 |
HIP 47416 |
25.06 |
| 2026-06-05 00:00 |
09:39:30.90 |
-38:06:41.3 |
HIP 47416 |
23.77 |
| 2026-06-05 12:00 |
09:39:36.84 |
-38:05:32.2 |
HIP 47416 |
22.53 |
| 2026-06-06 00:00 |
09:39:42.88 |
-38:04:23.8 |
HIP 47416 |
21.37 |
| 2026-06-06 12:00 |
09:39:49.02 |
-38:03:16.3 |
HIP 47416 |
20.28 |
| 2026-06-07 00:00 |
09:39:55.25 |
-38:02:09.6 |
HIP 47416 |
19.30 |
| 2026-06-07 12:00 |
09:40:01.57 |
-38:01:03.7 |
HIP 47416 |
18.42 |
| 2026-06-08 00:00 |
09:40:07.99 |
-37:59:58.6 |
HIP 47416 |
17.68 |
| 2026-06-08 12:00 |
09:40:14.50 |
-37:58:54.4 |
HIP 47416 |
17.09 |
| 2026-06-09 00:00 |
09:40:21.11 |
-37:57:51.0 |
HIP 47416 |
16.67 |
| 2026-06-09 12:00 |
09:40:27.80 |
-37:56:48.4 |
HIP 47416 |
16.44 |
| 2026-06-10 00:00 |
09:40:34.59 |
-37:55:46.7 |
HIP 47416 |
16.39 |
| 2026-06-10 12:00 |
09:40:41.47 |
-37:54:45.8 |
HIP 47416 |
16.55 |
| 2026-06-11 00:00 |
09:40:48.44 |
-37:53:45.8 |
HIP 47416 |
16.89 |
| 2026-06-11 12:00 |
09:40:55.50 |
-37:52:46.7 |
HIP 47416 |
17.42 |
| 2026-06-12 00:00 |
09:41:02.65 |
-37:51:48.4 |
HIP 47416 |
18.12 |
| 2026-06-12 12:00 |
09:41:09.89 |
-37:50:50.9 |
HIP 47416 |
18.97 |
| 2026-06-13 00:00 |
09:41:17.22 |
-37:49:54.4 |
HIP 47416 |
19.96 |
| 2026-06-13 12:00 |
09:41:24.63 |
-37:48:58.7 |
HIP 47416 |
21.06 |
| 2026-06-14 00:00 |
09:41:32.13 |
-37:48:03.9 |
HIP 47416 |
22.27 |
| 2026-06-14 12:00 |
09:41:39.71 |
-37:47:10.0 |
HIP 47416 |
23.56 |
| 2026-06-15 00:00 |
09:41:47.38 |
-37:46:17.0 |
HIP 47585 |
22.77 |
| 2026-06-15 12:00 |
09:41:55.14 |
-37:45:24.9 |
HIP 47585 |
21.67 |
| 2026-06-16 00:00 |
09:42:02.98 |
-37:44:33.7 |
HIP 47585 |
20.68 |
| 2026-06-16 12:00 |
09:42:10.90 |
-37:43:43.4 |
HIP 47585 |
19.81 |
| 2026-06-17 00:00 |
09:42:18.90 |
-37:42:54.0 |
HIP 47585 |
19.09 |
| 2026-06-17 12:00 |
09:42:26.99 |
-37:42:05.5 |
HIP 47585 |
18.53 |
| 2026-06-18 00:00 |
09:42:35.15 |
-37:41:17.9 |
HIP 47585 |
18.15 |
| 2026-06-18 12:00 |
09:42:43.40 |
-37:40:31.3 |
HIP 47585 |
17.97 |
| 2026-06-19 00:00 |
09:42:51.72 |
-37:39:45.5 |
HIP 47585 |
17.98 |
| 2026-06-19 12:00 |
09:43:00.12 |
-37:39:00.7 |
HIP 47585 |
18.20 |
| 2026-06-20 00:00 |
09:43:08.60 |
-37:38:16.8 |
HIP 47585 |
18.62 |
| 2026-06-20 12:00 |
09:43:17.16 |
-37:37:33.9 |
HIP 47585 |
19.23 |
| 2026-06-21 00:00 |
09:43:25.79 |
-37:36:51.8 |
HIP 47585 |
20.02 |
| 2026-06-21 12:00 |
09:43:34.50 |
-37:36:10.7 |
HIP 47585 |
20.96 |
| 2026-06-22 00:00 |
09:43:43.28 |
-37:35:30.6 |
HIP 47585 |
22.03 |