Open Access
Table A.2
A(0)fρ computed at nucleus distance ρ = 10000 km for comet C/2021 A1 from the TRAPPIST-South monitoring.
| UT Date | JD-2450000 midpoint | ΔT (days) | rh (au) | Δ (au) | A(0)fρ(B) | A(0)fρ(V) | A(0)fρ(R) | A(0)fρ (cm) A(0)fρ(I) | A(0)fρ(RC) | A(0)fρ(GC) | A(0)fρ(BC) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021-04-03 | 9308.49 | −274 | 4.12 | 3.62 | 207±15 | 262±15 | 260±11 | 251±15 | |||
| 2021-04-18 | 9323.50 | −259 | 3.95 | 3.58 | 193±25 | 259±20 | 202±13 | 139±22 | |||
| 2021-05-06 | 9341.39 | −241 | 3.75 | 3.59 | 165±21 | 184±9 | 212±11 | 193±16 | |||
| 2021-05-13 | 9348.47 | −234 | 3.67 | 3.60 | 135±15 | 143±8 | 153±8 | 146±14 | |||
| 2021-06-01 | 9367.48 | −215 | 3.44 | 3.62 | 153±13 | 192±10 | 195±9 | 183±8 | |||
| 2021-06-09 | 9375.43 | −207 | 3.35 | 3.63 | 85±13 | 109±12 | 118±7 | 112±12 | |||
| 2021-06-14 | 9380.43 | −202 | 3.29 | 3.63 | 202±19 | 231±9 | 250±10 | 244±19 | |||
| 2021-06-27 | 9393.40 | −189 | 3.13 | 3.62 | 126±12 | 213±8 | 206±6 | 221±9 | |||
| 2021-07-03 | 9399.39 | −183 | 3.06 | 3.61 | 122±8 | 146±9 | 144±10 | 143±17 | |||
| 2021-07-07 | 9403.40 | −179 | 3.00 | 3.59 | 205±9 | ||||||
| 2021-07-13 | 9409.39 | −173 | 2.93 | 3.57 | 159±17 | 172±14 | 187±9 | 212±12 | |||
| 2021-07-14 | 9410.39 | −172 | 2.92 | 3.56 | 160±18 | 130±10 | 202±11 | 227±16 | |||
| 2021-12-19 | 9567.53 | −15 | 0.70 | 0.35 | 1341±30 | 1601±20 | 1242±10 | 1257±5 | 1238±10 | 906±22 | |
| 2021-12-21* | 9569.54 | −13 | 0.68 | 0.42 | 5216±192 | 6357±130 | 5707±80 | 5711±38 | 5793±44 | 4583±90 | 4226±148 |
| 2021-12-22 | 9570.54 | −12 | 0.67 | 0.46 | 2079±79 | 2458±53 | 1925±36 | 1891±15 | 1906±18 | 1524±36 | 1359±55 |
| 2021-12-23 | 9571.54 | −11 | 0.66 | 0.49 | 1351±68 | 1505±43 | 988±29 | 950±14 | 965±23 | 801±32 | 672±62 |
| 2021-12-25* | 9573.55 | −9 | 0.65 | 0.57 | 8138±47 | 9635±31 | 7427±18 | 7685±8 | 7870±9 | 6459±21 | 5520±32 |
| 2021-12-26 | 9574.58 | −8 | 0.64 | 0.61 | 5819±415 | 7057±283 | 4831±132 | 4428±56 | 4514±66 | 3862±152 | 3294±234 |
| 2021-12-29 | 9577.55 | −5 | 0.63 | 0.72 | 4188±36 | 4744±23 | 3499±15 | 3542±9 | 3545±11 | 2927±15 | 2434±26 |
| 2021-12-30* | 9578.55 | −4 | 0.62 | 0.76 | 23630±490 | 27180±316 | 17604±142 | 15600±62 | 16405±71 | 14848±171 | 12349±251 |
| 2021-12-31 | 9579.55 | −3 | 0.62 | 0.80 | 12096±441 | 14414±302 | 9657±150 | 9284±87 | 9086±84 | 7669±156 | 6398±231 |
| 2022-01-01 | 9580.55 | −2 | 0.62 | 0.83 | 17782±176 | 21845±124 | 14539±58 | 13519±27 | 13360±31 | 11702±64 | 9969±97 |
| 2022-01-02* | 9581.55 | −1 | 0.62 | 0.87 | 20353±650 | 24806±446 | 16602±205 | 16020±93 | 15980±103 | 13523±238 | 11346±355 |
| 2022-01-03 | 9582.55 | 0 | 0.61 | 0.91 | 13761±120 | 16691±81 | 10732±36 | 10003±16 | 10204±19 | 8851±42 | 7405±64 |
| 2022-01-04 | 9583.54 | 1 | 0.61 | 0.94 | 9854±331 | 11507±221 | 7045±99 | 6649±51 | 6728±55 | 5860±111 | 4695±168 |
| 2022-01-05 | 9584.54 | 2 | 0.62 | 0.98 | 5483±91 | 6094±57 | 4524±29 | 4555±14 | 4651±17 | 3830±35 | 3377±55 |
| 2022-01-06 | 9585.54 | 3 | 0.62 | 1.02 | 3709±185 | 4166±118 | 3637±76 | 3638±37 | 3960±42 | 3161±86 | 2767±140 |
| 2022-01-07 | 9586.54 | 4 | 0.62 | 1.05 | 2970±86 | 2930±47 | 1805±31 | 1747±11 | 2113±22 | 1707±31 | 1422±53 |
| 2022-01-08* | 9587.54 | 5 | 0.62 | 1.09 | 15838±209 | 16958±125 | 8643±43 | 7761±18 | 9443±24 | 8565±60 | 7365±91 |
| 2022-01-09 | 9588.54 | 6 | 0.63 | 1.12 | 18378±1048 | 20170±646 | 14024±302 | 13708±137 | 14990±168 | 12710±390 | 11101±600 |
| 2022-01-12* | 9591.53 | 9 | 0.64 | 1.22 | 14751±137 | 16942±88 | 9475±34 | 8329±15 | 8546±17 | 7402±38 | 5947±55 |
| 2022-01-13 | 9592.53 | 10 | 0.65 | 1.25 | 5198±332 | 6633±236 | 4971±121 | 4917±59 | 5020±75 | 3625±127 | 2897±185 |
| 2022-01-17 | 9596.53 | 14 | 0.68 | 1.37 | 3856±62 | 4330±43 | 2714±23 | 2440±15 | 2633±18 | 2185±22 | 1932±55 |
| 2022-01-18 | 9597.54 | 15 | 0.69 | 1.40 | 6177±30 | 7276±20 | 4268±8 | 3709±3 | 3940±4 | 2846±16 | |
| 2022-01-19 | 9598.54 | 16 | 0.70 | 1.43 | 5479±388 | 6383±259 | 4145±134 | 3604±51 | 3884±70 | 3004±235 | |
| 2022-01-20 | 9599.53 | 17 | 0.71 | 1.45 | 4040±293 | 5215±211 | 3671±111 | 3412±46 | 3446±58 | 2214±167 | |
| 2022-01-21 | 9600.53 | 18 | 0.72 | 1.48 | 5829±434 | 6845±282 | 4546±118 | 4073±53 | 4378±65 | 3387±219 | |
| 2022-01-22 | 9601.53 | 19 | 0.74 | 1.50 | 3995±201 | 4650±130 | 3692±81 | 3461±32 | 3652±46 | 3089±191 | |
| 2022-01-23 | 9602.53 | 20 | 0.75 | 1.53 | 6274±258 | 7061±162 | 4565±75 | 4110±30 | 4236±39 | 3541±143 | |
| 2022-01-26 | 9605.53 | 23 | 0.78 | 1.60 | 4264±23 | 3944±12 | 3242±52 |
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