메타데이터
| 항목 |
값 |
| Designation |
104P/Kowal 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-01-11T14:49:09.753600Z |
| Orbit solution date (soln_date, UTC) |
2023-04-05T03:16:58Z |
| Obs used |
1551 |
| NEO |
Yes |
| M1 |
14.600 |
| K1 |
12.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-09-29.0000000 |
| e |
0.66545272 |
| q (au) |
1.073098 |
| a (au) |
3.207614 |
| i (deg) |
5.701090 |
| Ω (om, deg) |
207.213526 |
| ω (w, deg) |
227.245888 |
| M (ma, deg) |
342.051208 |
밝기
산란 + 전체 선형
$$
M_a = (13.882 + 3.137\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.882 |
| n |
3.137 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-08-11 |
2021-11-29 |
+3.2064 |
+1.741 |
| 2021-11-29 |
2022-01-11 |
+71.5132 |
-3.914 |
| 2022-01-11 |
2022-07-20 |
-2.8823 |
-1.387 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
19:30:22.33 |
-16:32:11.4 |
HIP 96008 |
15.29 |
| 2026-03-26 12:00 |
19:30:38.50 |
-16:31:01.1 |
HIP 96008 |
11.46 |
| 2026-03-27 00:00 |
19:30:54.53 |
-16:29:50.8 |
HIP 96008 |
7.87 |
| 2026-03-27 12:00 |
19:31:10.39 |
-16:28:40.6 |
HIP 96008 |
5.00 |
| 2026-03-28 00:00 |
19:31:26.11 |
-16:27:30.5 |
HIP 96008 |
4.42 |
| 2026-03-28 12:00 |
19:31:41.66 |
-16:26:20.4 |
HIP 96008 |
6.69 |
| 2026-03-29 00:00 |
19:31:57.06 |
-16:25:10.3 |
HIP 96008 |
9.99 |
| 2026-03-29 12:00 |
19:32:12.31 |
-16:24:00.3 |
HIP 96008 |
13.56 |
| 2026-03-30 00:00 |
19:32:27.39 |
-16:22:50.4 |
HIP 96008 |
17.20 |
| 2026-03-30 12:00 |
19:32:42.31 |
-16:21:40.6 |
HIP 96176 |
17.49 |
| 2026-03-31 00:00 |
19:32:57.07 |
-16:20:30.9 |
HIP 96217 |
15.12 |
| 2026-03-31 12:00 |
19:33:11.67 |
-16:19:21.2 |
HIP 96217 |
11.44 |
| 2026-04-01 00:00 |
19:33:26.11 |
-16:18:11.6 |
HIP 96217 |
7.79 |
| 2026-04-01 12:00 |
19:33:40.38 |
-16:17:02.2 |
HIP 96217 |
4.21 |
| 2026-04-02 00:00 |
19:33:54.49 |
-16:15:52.8 |
HIP 96217 |
0.96 |
| 2026-04-02 12:00 |
19:34:08.43 |
-16:14:43.5 |
HIP 96217 |
3.08 |
| 2026-04-03 00:00 |
19:34:22.20 |
-16:13:34.4 |
HIP 96248 |
5.65 |
| 2026-04-03 12:00 |
19:34:35.80 |
-16:12:25.4 |
HIP 96248 |
8.19 |
| 2026-04-04 00:00 |
19:34:49.24 |
-16:11:16.5 |
HIP 96248 |
11.21 |
| 2026-04-04 12:00 |
19:35:02.50 |
-16:10:07.7 |
HIP 96248 |
14.37 |
| 2026-04-05 00:00 |
19:35:15.59 |
-16:08:59.1 |
HIP 96248 |
17.58 |
| 2026-04-05 12:00 |
19:35:28.51 |
-16:07:50.6 |
HIP 96248 |
20.80 |
| 2026-04-06 00:00 |
19:35:41.25 |
-16:06:42.2 |
HIP 96248 |
24.00 |
| 2026-04-06 12:00 |
19:35:53.82 |
-16:05:34.0 |
HIP 96510 |
25.08 |
| 2026-04-07 00:00 |
19:36:06.21 |
-16:04:26.0 |
HIP 96510 |
23.77 |
| 2026-04-07 12:00 |
19:36:18.42 |
-16:03:18.2 |
HIP 96510 |
22.84 |
| 2026-04-08 00:00 |
19:36:30.45 |
-16:02:10.5 |
HIP 96510 |
22.34 |
| 2026-04-08 12:00 |
19:36:42.30 |
-16:01:03.0 |
HIP 96510 |
22.27 |
| 2026-04-09 00:00 |
19:36:53.97 |
-15:59:55.6 |
HIP 96510 |
22.63 |
| 2026-04-09 12:00 |
19:37:05.46 |
-15:58:48.5 |
HIP 96510 |
23.37 |
| 2026-04-10 00:00 |
19:37:16.76 |
-15:57:41.6 |
HIP 96510 |
24.45 |
| 2026-04-10 12:00 |
19:37:27.88 |
-15:56:34.8 |
HIP 96510 |
25.81 |
| 2026-04-11 00:00 |
19:37:38.81 |
-15:55:28.3 |
HIP 96510 |
27.40 |
| 2026-04-11 12:00 |
19:37:49.55 |
-15:54:22.0 |
HIP 96510 |
29.16 |
| 2026-04-12 00:00 |
19:38:00.10 |
-15:53:15.9 |
HIP 96510 |
31.05 |
| 2026-04-12 12:00 |
19:38:10.46 |
-15:52:10.1 |
HIP 96782 |
31.63 |
| 2026-04-13 00:00 |
19:38:20.63 |
-15:51:04.5 |
HIP 96782 |
29.09 |
| 2026-04-13 12:00 |
19:38:30.60 |
-15:49:59.1 |
HIP 96782 |
26.62 |
| 2026-04-14 00:00 |
19:38:40.38 |
-15:48:54.0 |
HIP 96782 |
24.23 |
| 2026-04-14 12:00 |
19:38:49.96 |
-15:47:49.1 |
HIP 96782 |
21.94 |
| 2026-04-15 00:00 |
19:38:59.35 |
-15:46:44.5 |
HIP 96782 |
19.75 |
| 2026-04-15 12:00 |
19:39:08.54 |
-15:45:40.2 |
HIP 96782 |
17.70 |
| 2026-04-16 00:00 |
19:39:17.53 |
-15:44:36.2 |
HIP 96782 |
15.80 |