메타데이터
| 항목 |
값 |
| Designation |
P/2020 T3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-20T11:20:03.816960Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:13:00Z |
| Obs used |
181 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
33.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-10-10T08:48:39.168000Z |
| Discovery magnitude (MPC) |
21.30 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-12-02.0000000 |
| e |
0.59149152 |
| q (au) |
1.436615 |
| a (au) |
3.516732 |
| i (deg) |
7.295760 |
| Ω (om, deg) |
74.020875 |
| ω (w, deg) |
357.042704 |
| M (ma, deg) |
352.606384 |
밝기
산란 + 전체 선형
$$
M_a = (15.642 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.642 |
| n |
6.000 |
| 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 |
| 2020-09-09 |
2021-01-18 |
+15.9275 |
-3.268 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
20:49:43.98 |
-23:06:50.1 |
HIP 102668 |
25.71 |
| 2026-05-12 12:00 |
20:49:52.78 |
-23:07:15.0 |
HIP 102837 |
27.20 |
| 2026-05-13 00:00 |
20:50:01.36 |
-23:07:40.9 |
HIP 102837 |
26.69 |
| 2026-05-13 12:00 |
20:50:09.71 |
-23:08:07.9 |
HIP 102837 |
26.31 |
| 2026-05-14 00:00 |
20:50:17.82 |
-23:08:36.1 |
HIP 102837 |
26.04 |
| 2026-05-14 12:00 |
20:50:25.70 |
-23:09:05.3 |
HIP 102837 |
25.88 |
| 2026-05-15 00:00 |
20:50:33.34 |
-23:09:35.7 |
HIP 102998 |
24.97 |
| 2026-05-15 12:00 |
20:50:40.75 |
-23:10:07.2 |
HIP 102998 |
23.88 |
| 2026-05-16 00:00 |
20:50:47.92 |
-23:10:39.8 |
HIP 102998 |
22.94 |
| 2026-05-16 12:00 |
20:50:54.85 |
-23:11:13.5 |
HIP 102998 |
22.15 |
| 2026-05-17 00:00 |
20:51:01.54 |
-23:11:48.4 |
HIP 102998 |
21.51 |
| 2026-05-17 12:00 |
20:51:07.98 |
-23:12:24.4 |
HIP 102998 |
21.04 |
| 2026-05-18 00:00 |
20:51:14.18 |
-23:13:01.6 |
HIP 102998 |
20.72 |
| 2026-05-18 12:00 |
20:51:20.14 |
-23:13:39.9 |
HIP 102998 |
20.56 |
| 2026-05-19 00:00 |
20:51:25.86 |
-23:14:19.4 |
HIP 102998 |
20.55 |
| 2026-05-19 12:00 |
20:51:31.32 |
-23:15:00.0 |
HIP 102998 |
20.68 |
| 2026-05-20 00:00 |
20:51:36.54 |
-23:15:41.8 |
HIP 102998 |
20.95 |
| 2026-05-20 12:00 |
20:51:41.51 |
-23:16:24.8 |
HIP 102998 |
21.33 |
| 2026-05-21 00:00 |
20:51:46.22 |
-23:17:08.9 |
HIP 102998 |
21.83 |
| 2026-05-21 12:00 |
20:51:50.69 |
-23:17:54.2 |
HIP 102998 |
22.41 |
| 2026-05-22 00:00 |
20:51:54.90 |
-23:18:40.6 |
HIP 102998 |
23.08 |
| 2026-05-22 12:00 |
20:51:58.86 |
-23:19:28.2 |
HIP 102998 |
23.81 |
| 2026-05-23 00:00 |
20:52:02.57 |
-23:20:17.0 |
HIP 102998 |
24.60 |
| 2026-05-23 12:00 |
20:52:06.02 |
-23:21:07.0 |
HIP 102998 |
25.44 |
| 2026-05-24 00:00 |
20:52:09.21 |
-23:21:58.1 |
HIP 102998 |
26.32 |
| 2026-05-24 12:00 |
20:52:12.15 |
-23:22:50.4 |
HIP 103071 |
26.62 |
| 2026-05-25 00:00 |
20:52:14.82 |
-23:23:43.9 |
HIP 103071 |
25.55 |
| 2026-05-25 12:00 |
20:52:17.24 |
-23:24:38.6 |
HIP 103071 |
24.50 |
| 2026-05-26 00:00 |
20:52:19.40 |
-23:25:34.4 |
HIP 103071 |
23.44 |
| 2026-05-26 12:00 |
20:52:21.29 |
-23:26:31.5 |
HIP 103071 |
22.40 |
| 2026-05-27 00:00 |
20:52:22.92 |
-23:27:29.7 |
HIP 103071 |
21.36 |
| 2026-05-27 12:00 |
20:52:24.28 |
-23:28:29.1 |
HIP 103071 |
20.33 |
| 2026-05-28 00:00 |
20:52:25.38 |
-23:29:29.7 |
HIP 103071 |
19.31 |
| 2026-05-28 12:00 |
20:52:26.21 |
-23:30:31.5 |
HIP 103071 |
18.30 |
| 2026-05-29 00:00 |
20:52:26.78 |
-23:31:34.4 |
HIP 103071 |
17.30 |
| 2026-05-29 12:00 |
20:52:27.07 |
-23:32:38.6 |
HIP 103071 |
16.32 |
| 2026-05-30 00:00 |
20:52:27.10 |
-23:33:43.9 |
HIP 103071 |
15.37 |
| 2026-05-30 12:00 |
20:52:26.86 |
-23:34:50.4 |
HIP 103071 |
14.45 |
| 2026-05-31 00:00 |
20:52:26.34 |
-23:35:58.1 |
HIP 103071 |
13.59 |
| 2026-05-31 12:00 |
20:52:25.55 |
-23:37:07.0 |
HIP 103071 |
12.79 |
| 2026-06-01 00:00 |
20:52:24.48 |
-23:38:17.1 |
HIP 103071 |
12.08 |
| 2026-06-01 12:00 |
20:52:23.14 |
-23:39:28.4 |
HIP 103071 |
11.48 |
| 2026-06-02 00:00 |
20:52:21.52 |
-23:40:40.8 |
HIP 103071 |
11.04 |