메타데이터
| 항목 |
값 |
| Designation |
15P/Finlay |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-12-27T01:44:35.957760Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T11:19:30Z |
| Obs used |
1655 |
| NEO |
Yes |
| M1 |
14.900 |
| K1 |
8.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-11-01.0000000 |
| e |
0.72018544 |
| q (au) |
0.976687 |
| a (au) |
3.490479 |
| i (deg) |
6.800480 |
| Ω (om, deg) |
13.753875 |
| ω (w, deg) |
347.625750 |
| M (ma, deg) |
46.690962 |
밝기
산란 + 전체 선형
$$
M_a = (14.416 + 5.627\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.416 |
| n |
5.627 |
| gf |
1.000 |
| gb |
-0.643 |
| k |
0.800 |
| 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 |
| 2021-04-10 |
2022-03-03 |
+4.0180 |
-1.591 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
12:58:13.84 |
-07:58:08.5 |
HIP 63362 |
47.55 |
| 2026-07-29 12:00 |
12:58:25.91 |
-07:59:25.8 |
HIP 63362 |
45.67 |
| 2026-07-30 00:00 |
12:58:38.13 |
-08:00:43.9 |
HIP 63362 |
43.92 |
| 2026-07-30 12:00 |
12:58:50.49 |
-08:02:03.0 |
HIP 63362 |
42.34 |
| 2026-07-31 00:00 |
12:59:03.00 |
-08:03:23.0 |
HIP 63474 |
40.33 |
| 2026-07-31 12:00 |
12:59:15.65 |
-08:04:43.8 |
HIP 63548 |
37.59 |
| 2026-08-01 00:00 |
12:59:28.44 |
-08:06:05.5 |
HIP 63548 |
34.23 |
| 2026-08-01 12:00 |
12:59:41.37 |
-08:07:28.1 |
HIP 63548 |
30.84 |
| 2026-08-02 00:00 |
12:59:54.44 |
-08:08:51.5 |
HIP 63548 |
27.45 |
| 2026-08-02 12:00 |
13:00:07.66 |
-08:10:15.8 |
HIP 63548 |
24.06 |
| 2026-08-03 00:00 |
13:00:21.01 |
-08:11:41.0 |
HIP 63548 |
20.69 |
| 2026-08-03 12:00 |
13:00:34.50 |
-08:13:07.0 |
HIP 63548 |
17.38 |
| 2026-08-04 00:00 |
13:00:48.14 |
-08:14:33.8 |
HIP 63548 |
14.19 |
| 2026-08-04 12:00 |
13:01:01.90 |
-08:16:01.5 |
HIP 63548 |
11.28 |
| 2026-08-05 00:00 |
13:01:15.81 |
-08:17:30.0 |
HIP 63548 |
8.96 |
| 2026-08-05 12:00 |
13:01:29.85 |
-08:18:59.4 |
HIP 63548 |
7.82 |
| 2026-08-06 00:00 |
13:01:44.03 |
-08:20:29.6 |
HIP 63548 |
8.42 |
| 2026-08-06 12:00 |
13:01:58.34 |
-08:22:00.6 |
HIP 63548 |
10.50 |
| 2026-08-07 00:00 |
13:02:12.79 |
-08:23:32.5 |
HIP 63548 |
13.42 |
| 2026-08-07 12:00 |
13:02:27.37 |
-08:25:05.1 |
HIP 63548 |
16.77 |
| 2026-08-08 00:00 |
13:02:42.09 |
-08:26:38.6 |
HIP 63548 |
20.36 |
| 2026-08-08 12:00 |
13:02:56.94 |
-08:28:12.9 |
HIP 63548 |
24.09 |
| 2026-08-09 00:00 |
13:03:11.92 |
-08:29:47.9 |
HIP 63818 |
23.93 |
| 2026-08-09 12:00 |
13:03:27.03 |
-08:31:23.8 |
HIP 63818 |
19.98 |
| 2026-08-10 00:00 |
13:03:42.27 |
-08:33:00.5 |
HIP 63818 |
16.05 |
| 2026-08-10 12:00 |
13:03:57.64 |
-08:34:37.9 |
HIP 63818 |
12.21 |
| 2026-08-11 00:00 |
13:04:13.14 |
-08:36:16.1 |
HIP 63818 |
8.60 |
| 2026-08-11 12:00 |
13:04:28.77 |
-08:37:55.1 |
HIP 63818 |
5.80 |
| 2026-08-12 00:00 |
13:04:44.53 |
-08:39:34.9 |
HIP 63818 |
5.36 |
| 2026-08-12 12:00 |
13:05:00.42 |
-08:41:15.5 |
HIP 63818 |
7.74 |
| 2026-08-13 00:00 |
13:05:16.43 |
-08:42:56.8 |
HIP 63818 |
11.33 |
| 2026-08-13 12:00 |
13:05:32.56 |
-08:44:38.8 |
HIP 63818 |
15.32 |
| 2026-08-14 00:00 |
13:05:48.82 |
-08:46:21.6 |
HIP 63818 |
19.49 |
| 2026-08-14 12:00 |
13:06:05.21 |
-08:48:05.1 |
HIP 63931 |
22.70 |
| 2026-08-15 00:00 |
13:06:21.71 |
-08:49:49.4 |
HIP 63931 |
24.61 |
| 2026-08-15 12:00 |
13:06:38.34 |
-08:51:34.4 |
HIP 63931 |
27.13 |
| 2026-08-16 00:00 |
13:06:55.10 |
-08:53:20.1 |
HIP 64122 |
24.72 |
| 2026-08-16 12:00 |
13:07:11.97 |
-08:55:06.6 |
HIP 64122 |
20.27 |
| 2026-08-17 00:00 |
13:07:28.96 |
-08:56:53.7 |
HIP 64122 |
15.84 |
| 2026-08-17 12:00 |
13:07:46.07 |
-08:58:41.5 |
HIP 64122 |
11.47 |
| 2026-08-18 00:00 |
13:08:03.30 |
-09:00:30.1 |
HIP 64122 |
7.35 |
| 2026-08-18 12:00 |
13:08:20.64 |
-09:02:19.3 |
HIP 64122 |
4.39 |
| 2026-08-19 00:00 |
13:08:38.10 |
-09:04:09.3 |
HIP 64122 |
5.29 |