메타데이터
| 항목 |
값 |
| Designation |
302P/Lemmon-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-08T21:57:36.077760Z |
| Orbit solution date (soln_date, UTC) |
2026-09-21T07:12:14Z |
| Obs used |
997 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
16.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-08-23.0000000 |
| e |
0.23011534 |
| q (au) |
3.288819 |
| a (au) |
4.271834 |
| i (deg) |
6.033746 |
| Ω (om, deg) |
121.724188 |
| ω (w, deg) |
208.545752 |
| M (ma, deg) |
297.049934 |
밝기
산란 + 전체 선형
$$
M_a = (6.299 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.299 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.908 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-03-27 |
2024-12-03 |
+19.4138 |
-10.040 |
| 2025-05-17 |
2026-09-21 |
+7.9486 |
-4.607 |
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 |
04:49:42.70 |
+16:31:11.1 |
HIP 22347 |
16.25 |
| 2026-09-20 12:00 |
04:49:49.73 |
+16:30:53.3 |
HIP 22347 |
17.91 |
| 2026-09-21 00:00 |
04:49:56.50 |
+16:30:35.1 |
HIP 22347 |
19.52 |
| 2026-09-21 12:00 |
04:50:03.03 |
+16:30:16.4 |
HIP 22524 |
20.74 |
| 2026-09-22 00:00 |
04:50:09.31 |
+16:29:57.4 |
HIP 22524 |
19.71 |
| 2026-09-22 12:00 |
04:50:15.33 |
+16:29:37.8 |
HIP 22524 |
18.77 |
| 2026-09-23 00:00 |
04:50:21.10 |
+16:29:17.9 |
HIP 22524 |
17.92 |
| 2026-09-23 12:00 |
04:50:26.62 |
+16:28:57.5 |
HIP 22524 |
17.15 |
| 2026-09-24 00:00 |
04:50:31.88 |
+16:28:36.7 |
HIP 22524 |
16.47 |
| 2026-09-24 12:00 |
04:50:36.89 |
+16:28:15.5 |
HIP 22524 |
15.87 |
| 2026-09-25 00:00 |
04:50:41.65 |
+16:27:53.8 |
HIP 22524 |
15.35 |
| 2026-09-25 12:00 |
04:50:46.15 |
+16:27:31.8 |
HIP 22524 |
14.91 |
| 2026-09-26 00:00 |
04:50:50.39 |
+16:27:09.3 |
HIP 22524 |
14.53 |
| 2026-09-26 12:00 |
04:50:54.37 |
+16:26:46.4 |
HIP 22524 |
14.21 |
| 2026-09-27 00:00 |
04:50:58.10 |
+16:26:23.2 |
HIP 22524 |
13.95 |
| 2026-09-27 12:00 |
04:51:01.57 |
+16:25:59.5 |
HIP 22524 |
13.72 |
| 2026-09-28 00:00 |
04:51:04.78 |
+16:25:35.4 |
HIP 22524 |
13.54 |
| 2026-09-28 12:00 |
04:51:07.72 |
+16:25:11.0 |
HIP 22524 |
13.37 |
| 2026-09-29 00:00 |
04:51:10.41 |
+16:24:46.1 |
HIP 22524 |
13.23 |
| 2026-09-29 12:00 |
04:51:12.84 |
+16:24:20.9 |
HIP 22524 |
13.09 |
| 2026-09-30 00:00 |
04:51:15.00 |
+16:23:55.3 |
HIP 22524 |
12.96 |
| 2026-09-30 12:00 |
04:51:16.90 |
+16:23:29.3 |
HIP 22524 |
12.82 |
| 2026-10-01 00:00 |
04:51:18.54 |
+16:23:03.0 |
HIP 22524 |
12.67 |
| 2026-10-01 12:00 |
04:51:19.92 |
+16:22:36.2 |
HIP 22524 |
12.50 |
| 2026-10-02 00:00 |
04:51:21.03 |
+16:22:09.1 |
HIP 22524 |
12.31 |
| 2026-10-02 12:00 |
04:51:21.87 |
+16:21:41.7 |
HIP 22524 |
12.10 |
| 2026-10-03 00:00 |
04:51:22.45 |
+16:21:13.9 |
HIP 22524 |
11.85 |
| 2026-10-03 12:00 |
04:51:22.76 |
+16:20:45.7 |
HIP 22524 |
11.56 |
| 2026-10-04 00:00 |
04:51:22.81 |
+16:20:17.2 |
HIP 22524 |
11.24 |
| 2026-10-04 12:00 |
04:51:22.59 |
+16:19:48.4 |
HIP 22524 |
10.88 |
| 2026-10-05 00:00 |
04:51:22.10 |
+16:19:19.2 |
HIP 22524 |
10.48 |
| 2026-10-05 12:00 |
04:51:21.34 |
+16:18:49.6 |
HIP 22524 |
10.03 |
| 2026-10-06 00:00 |
04:51:20.32 |
+16:18:19.8 |
HIP 22524 |
9.53 |
| 2026-10-06 12:00 |
04:51:19.02 |
+16:17:49.6 |
HIP 22524 |
8.98 |
| 2026-10-07 00:00 |
04:51:17.46 |
+16:17:19.1 |
HIP 22524 |
8.38 |
| 2026-10-07 12:00 |
04:51:15.63 |
+16:16:48.2 |
HIP 22524 |
7.74 |
| 2026-10-08 00:00 |
04:51:13.53 |
+16:16:17.1 |
HIP 22524 |
7.03 |
| 2026-10-08 12:00 |
04:51:11.16 |
+16:15:45.7 |
HIP 22524 |
6.28 |
| 2026-10-09 00:00 |
04:51:08.53 |
+16:15:13.9 |
HIP 22524 |
5.47 |
| 2026-10-09 12:00 |
04:51:05.63 |
+16:14:41.9 |
HIP 22524 |
4.60 |
| 2026-10-10 00:00 |
04:51:02.45 |
+16:14:09.6 |
HIP 22524 |
3.68 |
| 2026-10-10 12:00 |
04:50:59.01 |
+16:13:37.0 |
HIP 22524 |
2.71 |
| 2026-10-11 00:00 |
04:50:55.31 |
+16:13:04.1 |
HIP 22524 |
1.69 |