메타데이터
| 항목 |
값 |
| Designation |
C/2022 W3 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-06-22T18:37:13.267200Z |
| Orbit solution date (soln_date, UTC) |
2024-02-01T00:43:16Z |
| Obs used |
876 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-11-26T11:27:43.689600Z |
| Discovery magnitude (MPC) |
19.72 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-05-23.0000000 |
| e |
0.99503341 |
| q (au) |
1.397698 |
| a (au) |
281.420082 |
| i (deg) |
103.558036 |
| Ω (om, deg) |
132.268653 |
| ω (w, deg) |
116.521323 |
| M (ma, deg) |
359.993575 |
밝기
산란 + 전체 선형
$$
M_a = (15.045 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.045 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.992 |
| 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 |
| 2022-11-13 |
2022-12-26 |
+10.0116 |
-4.536 |
| 2022-12-26 |
2023-02-14 |
+14.3184 |
-6.086 |
| 2023-02-14 |
2023-06-22 |
+4.7617 |
-2.428 |
| 2023-06-24 |
2023-09-10 |
+9.8993 |
-1.871 |
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 |
09:32:36.55 |
-83:46:25.0 |
HIP 46373 |
17.52 |
| 2026-09-20 12:00 |
09:33:46.63 |
-83:47:35.0 |
HIP 46373 |
19.51 |
| 2026-09-21 00:00 |
09:34:56.60 |
-83:48:45.5 |
HIP 46373 |
21.56 |
| 2026-09-21 12:00 |
09:36:06.45 |
-83:49:56.5 |
HIP 46373 |
23.65 |
| 2026-09-22 00:00 |
09:37:16.20 |
-83:51:07.9 |
HIP 46373 |
25.76 |
| 2026-09-22 12:00 |
09:38:25.83 |
-83:52:19.8 |
HIP 46373 |
27.88 |
| 2026-09-23 00:00 |
09:39:35.34 |
-83:53:32.2 |
HIP 46373 |
30.03 |
| 2026-09-23 12:00 |
09:40:44.75 |
-83:54:45.0 |
HIP 48724 |
29.40 |
| 2026-09-24 00:00 |
09:41:54.05 |
-83:55:58.3 |
HIP 48724 |
28.46 |
| 2026-09-24 12:00 |
09:43:03.24 |
-83:57:12.1 |
HIP 48724 |
27.69 |
| 2026-09-25 00:00 |
09:44:12.32 |
-83:58:26.3 |
HIP 48724 |
27.10 |
| 2026-09-25 12:00 |
09:45:21.30 |
-83:59:41.0 |
HIP 48724 |
26.70 |
| 2026-09-26 00:00 |
09:46:30.17 |
-84:00:56.2 |
HIP 48724 |
26.50 |
| 2026-09-26 12:00 |
09:47:38.94 |
-84:02:11.8 |
HIP 48724 |
26.50 |
| 2026-09-27 00:00 |
09:48:47.60 |
-84:03:28.0 |
HIP 49442 |
26.18 |
| 2026-09-27 12:00 |
09:49:56.16 |
-84:04:44.5 |
HIP 49442 |
24.30 |
| 2026-09-28 00:00 |
09:51:04.62 |
-84:06:01.6 |
HIP 49442 |
22.50 |
| 2026-09-28 12:00 |
09:52:12.98 |
-84:07:19.1 |
HIP 49442 |
20.79 |
| 2026-09-29 00:00 |
09:53:21.24 |
-84:08:37.1 |
HIP 49442 |
19.19 |
| 2026-09-29 12:00 |
09:54:29.40 |
-84:09:55.6 |
HIP 49442 |
17.74 |
| 2026-09-30 00:00 |
09:55:37.46 |
-84:11:14.5 |
HIP 49442 |
16.46 |
| 2026-09-30 12:00 |
09:56:45.43 |
-84:12:33.9 |
HIP 49442 |
15.41 |
| 2026-10-01 00:00 |
09:57:53.30 |
-84:13:53.8 |
HIP 49442 |
14.62 |
| 2026-10-01 12:00 |
09:59:01.07 |
-84:15:14.2 |
HIP 49442 |
14.15 |
| 2026-10-02 00:00 |
10:00:08.75 |
-84:16:35.0 |
HIP 49442 |
14.02 |
| 2026-10-02 12:00 |
10:01:16.33 |
-84:17:56.3 |
HIP 49442 |
14.25 |
| 2026-10-03 00:00 |
10:02:23.82 |
-84:19:18.1 |
HIP 49442 |
14.81 |
| 2026-10-03 12:00 |
10:03:31.21 |
-84:20:40.3 |
HIP 49442 |
15.67 |
| 2026-10-04 00:00 |
10:04:38.51 |
-84:22:03.1 |
HIP 49442 |
16.79 |
| 2026-10-04 12:00 |
10:05:45.72 |
-84:23:26.3 |
HIP 49442 |
18.10 |
| 2026-10-05 00:00 |
10:06:52.83 |
-84:24:50.0 |
HIP 49442 |
19.58 |
| 2026-10-05 12:00 |
10:07:59.85 |
-84:26:14.1 |
HIP 49442 |
21.19 |
| 2026-10-06 00:00 |
10:09:06.78 |
-84:27:38.8 |
HIP 49442 |
22.90 |
| 2026-10-06 12:00 |
10:10:13.61 |
-84:29:03.9 |
HIP 49442 |
24.69 |
| 2026-10-07 00:00 |
10:11:20.36 |
-84:30:29.5 |
HIP 51084 |
23.72 |
| 2026-10-07 12:00 |
10:12:27.01 |
-84:31:55.5 |
HIP 51084 |
22.87 |
| 2026-10-08 00:00 |
10:13:33.56 |
-84:33:22.1 |
HIP 51084 |
22.21 |
| 2026-10-08 12:00 |
10:14:40.03 |
-84:34:49.1 |
HIP 51084 |
21.77 |
| 2026-10-09 00:00 |
10:15:46.40 |
-84:36:16.6 |
HIP 51084 |
21.55 |
| 2026-10-09 12:00 |
10:16:52.68 |
-84:37:44.5 |
HIP 51084 |
21.57 |
| 2026-10-10 00:00 |
10:17:58.86 |
-84:39:13.0 |
HIP 51084 |
21.82 |
| 2026-10-10 12:00 |
10:19:04.96 |
-84:40:41.9 |
HIP 51084 |
22.30 |
| 2026-10-11 00:00 |
10:20:10.96 |
-84:42:11.2 |
HIP 51084 |
22.98 |