메타데이터
| 항목 |
값 |
| Designation |
C/2023 H2 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-10-29T04:33:37.779840Z |
| Orbit solution date (soln_date, UTC) |
2024-07-30T14:57:25Z |
| Obs used |
724 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
5.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-04-23T06:42:47.548800Z |
| Discovery magnitude (MPC) |
20.78 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-10-07.0000000 |
| e |
0.99628184 |
| q (au) |
0.894405 |
| a (au) |
240.550492 |
| i (deg) |
113.753483 |
| Ω (om, deg) |
217.044806 |
| ω (w, deg) |
150.650349 |
| M (ma, deg) |
359.994138 |
밝기
산란 + 전체 선형
$$
M_a = (13.783 + 4.803\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.783 |
| n |
4.803 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
| 2023-03-26 |
2023-10-28 |
+3.5183 |
-1.258 |
| 2023-10-29 |
2024-02-05 |
-12.4077 |
-0.879 |
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 |
14:29:27.88 |
-72:27:54.7 |
HIP 70533 |
17.47 |
| 2026-09-20 12:00 |
14:29:54.17 |
-72:26:26.0 |
HIP 71214 |
19.00 |
| 2026-09-21 00:00 |
14:30:20.56 |
-72:24:58.4 |
HIP 71214 |
17.85 |
| 2026-09-21 12:00 |
14:30:47.03 |
-72:23:31.6 |
HIP 71214 |
16.97 |
| 2026-09-22 00:00 |
14:31:13.59 |
-72:22:05.9 |
HIP 71214 |
16.39 |
| 2026-09-22 12:00 |
14:31:40.23 |
-72:20:41.1 |
HIP 71214 |
16.15 |
| 2026-09-23 00:00 |
14:32:06.95 |
-72:19:17.2 |
HIP 71214 |
16.27 |
| 2026-09-23 12:00 |
14:32:33.75 |
-72:17:54.3 |
HIP 71214 |
16.72 |
| 2026-09-24 00:00 |
14:33:00.64 |
-72:16:32.4 |
HIP 71214 |
17.49 |
| 2026-09-24 12:00 |
14:33:27.60 |
-72:15:11.4 |
HIP 71214 |
18.54 |
| 2026-09-25 00:00 |
14:33:54.64 |
-72:13:51.4 |
HIP 71214 |
19.81 |
| 2026-09-25 12:00 |
14:34:21.76 |
-72:12:32.3 |
HIP 71214 |
21.28 |
| 2026-09-26 00:00 |
14:34:48.95 |
-72:11:14.1 |
HIP 71214 |
22.90 |
| 2026-09-26 12:00 |
14:35:16.22 |
-72:09:56.9 |
HIP 71214 |
24.64 |
| 2026-09-27 00:00 |
14:35:43.56 |
-72:08:40.7 |
HIP 71214 |
26.48 |
| 2026-09-27 12:00 |
14:36:10.97 |
-72:07:25.4 |
HIP 71789 |
25.36 |
| 2026-09-28 00:00 |
14:36:38.46 |
-72:06:11.0 |
HIP 71789 |
24.17 |
| 2026-09-28 12:00 |
14:37:06.02 |
-72:04:57.6 |
HIP 71789 |
23.16 |
| 2026-09-29 00:00 |
14:37:33.64 |
-72:03:45.1 |
HIP 71789 |
22.36 |
| 2026-09-29 12:00 |
14:38:01.34 |
-72:02:33.6 |
HIP 71789 |
21.77 |
| 2026-09-30 00:00 |
14:38:29.11 |
-72:01:23.0 |
HIP 71789 |
21.43 |
| 2026-09-30 12:00 |
14:38:56.94 |
-72:00:13.3 |
HIP 71789 |
21.35 |
| 2026-10-01 00:00 |
14:39:24.84 |
-71:59:04.6 |
HIP 71789 |
21.52 |
| 2026-10-01 12:00 |
14:39:52.81 |
-71:57:56.8 |
HIP 71789 |
21.94 |
| 2026-10-02 00:00 |
14:40:20.84 |
-71:56:49.9 |
HIP 71789 |
22.59 |
| 2026-10-02 12:00 |
14:40:48.94 |
-71:55:44.0 |
HIP 72059 |
23.39 |
| 2026-10-03 00:00 |
14:41:17.10 |
-71:54:39.0 |
HIP 72159 |
22.43 |
| 2026-10-03 12:00 |
14:41:45.32 |
-71:53:34.9 |
HIP 72159 |
21.11 |
| 2026-10-04 00:00 |
14:42:13.61 |
-71:52:31.8 |
HIP 72159 |
19.99 |
| 2026-10-04 12:00 |
14:42:41.95 |
-71:51:29.6 |
HIP 72159 |
19.09 |
| 2026-10-05 00:00 |
14:43:10.36 |
-71:50:28.3 |
HIP 72159 |
18.45 |
| 2026-10-05 12:00 |
14:43:38.82 |
-71:49:28.0 |
HIP 72159 |
18.09 |
| 2026-10-06 00:00 |
14:44:07.35 |
-71:48:28.6 |
HIP 72159 |
18.04 |
| 2026-10-06 12:00 |
14:44:35.93 |
-71:47:30.1 |
HIP 72159 |
18.29 |
| 2026-10-07 00:00 |
14:45:04.57 |
-71:46:32.6 |
HIP 72159 |
18.83 |
| 2026-10-07 12:00 |
14:45:33.26 |
-71:45:36.0 |
HIP 72159 |
19.65 |
| 2026-10-08 00:00 |
14:46:02.01 |
-71:44:40.3 |
HIP 72159 |
20.70 |
| 2026-10-08 12:00 |
14:46:30.81 |
-71:43:45.5 |
HIP 72368 |
21.51 |
| 2026-10-09 00:00 |
14:46:59.66 |
-71:42:51.7 |
HIP 72207 |
21.52 |
| 2026-10-09 12:00 |
14:47:28.57 |
-71:41:58.8 |
HIP 72207 |
21.25 |
| 2026-10-10 00:00 |
14:47:57.52 |
-71:41:06.8 |
HIP 72207 |
21.27 |
| 2026-10-10 12:00 |
14:48:26.53 |
-71:40:15.8 |
HIP 72444 |
20.65 |
| 2026-10-11 00:00 |
14:48:55.58 |
-71:39:25.6 |
HIP 72801 |
18.62 |